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Old 07-20-14, 11:27 PM   #1
orcas island
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How to date this PX 10?

I found this bike on the local Craigslist today and since it was nearby I decided to have a look. The ad described it only as an "Older adult sized bike" with the usual non descript, distant, non-drive side photo. Since it clearly was a Peugeot, I headed over. I think it is a PX10 (chrome fork legs and rear triangle, remnants of a 531 triangular sticker on the fork legs, etc...), but I have no idea how old this might be. Seller said that her 80 year old father bought it new and modified it for long distance touring, but had no idea when it had been purchased. The bike has been modified quite a bit from standard spec; a TA triple replacing the original crankset, Phil Wood clincher wheelset replacing the stock setup, randonneur bars, Huret rear derailleur and front Cyclone changer complete the picture. No date codes that I can find on any of the components. The original Simplex seatpost and stem are still with the bike - might those provide any clues to it's age? The bike was extremely dirty and crusty; it took the entire afternoon to remove racks, computers, and various homemade items that cluttered things up. I discovered a small dent on the left side chainstay that I hadn't noticed when looking things over in the sellers driveway. Any ideas on the age of this bike? Peugeot experts are invited to weigh in! My only observation from looking at the reams of PX 10 info on the Forum is that the head tube and seat tube lugs are not the ornate type seen on 1960's bikes, but that the fork crown is the type with two additional points or legs seen on photos of 60's bikes rather than the plainer type common in photos of bikes from the mid to late 1970's... Experts?
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Old 07-20-14, 11:48 PM   #2
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decals say '70-'74.

Model ID
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Old 07-21-14, 03:26 AM   #3
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Start exploring for the 2-digit date stamps on hubs, pedals, inside of crank arms and sometimes on RD's. That will give you a good guess.
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Old 07-21-14, 03:29 AM   #4
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Dog bone stem say's 71-73.
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Old 07-21-14, 03:32 AM   #5
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Dog bone stem say's 71-73.
Very distinctive. I see triple chainring, barends and laid back frame. Sweet touring bike find.
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Old 07-21-14, 03:38 AM   #6
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Hello orcas island, I would roughly date it 1972.
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Old 07-21-14, 04:11 AM   #7
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The nice shallow touring bars with barend shifters, brake levers and vintage grab on covers are likely not original looks like the bike had some vintage upgrades changes during the 70's.
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Old 07-21-14, 05:19 AM   #8
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Dog bone stem say's 71-73.
I think that might be a Schwinn/GB girder style stem. Stem and bars could be a take off from a Schwinn bike.
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Old 07-21-14, 05:23 AM   #9
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Hello orcas island, I would roughly date it 1972.
+1.
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Old 07-21-14, 06:03 AM   #10
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Hi Sorry for tagging onto this thread but I have just been given a very similar vintage bike. I *think* it is Reynolds 531 but the stickers are in poor shape (and not very straight) so it could be 501.

It's a 1970's model as best I can determine, with fancy lugs.

It has the typical other period items - Brooks Professional saddle, 27.0 seatpost (possibly a replacement? It's the cheap type that clamps on the post and the post appears to be chromed steel and not alloy). French Stronglight Competition headset, Stronglight cranks. I expect it has a French BB but I don't have the correct tool to remove the cranks.

The serial number 1644689 is on a riveted alloy plate. Simplex dropouts, RD and FD, 5 spd Cyclo freewheel, Normandy hubs, Super Champion tubular rims, Mafac Racer brakes and chromed chainstays and fork bottoms. Seat tube has the "Inoxydable" sticker.

Thanks for any insight you can offer
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Old 07-21-14, 06:16 AM   #11
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Dog bone stem say's 71-73.
I had a 71, bought new, and it came with a PIVO stem.
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Old 07-21-14, 06:19 AM   #12
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Sure sounds like a PX-10 to me, CanAmSteve. The remnants of the Reynolds decals clearly show it is 531. Aside from that 27.O seat post, however. Should be 26.4 or 26.6 if I remember correctly.
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Old 07-21-14, 06:22 AM   #13
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Hi Sorry for tagging onto this thread but I have just been given a very similar vintage bike. I *think* it is Reynolds 531 but the stickers are in poor shape (and not very straight) so it could be 501.

It's a 1970's model as best I can determine, with fancy lugs.

It has the typical other period items - Brooks Professional saddle, 27.0 seatpost (possibly a replacement? It's the cheap type that clamps on the post and the post appears to be chromed steel and not alloy). French Stronglight Competition headset, Stronglight cranks. I expect it has a French BB but I don't have the correct tool to remove the cranks.

The serial number 1644689 is on a riveted alloy plate. Simplex dropouts, RD and FD, 5 spd Cyclo freewheel, Normandy hubs, Super Champion tubular rims, Mafac Racer brakes and chromed chainstays and fork bottoms. Seat tube has the "Inoxydable" sticker.

Thanks for any insight you can offer
Mostly your description points to a PX10 of about the same vintage as the OP's. The 27 seat post can't be right - a 26.4/26.6 Simplex badged post would be the norm. Frames with fancy and plain lugs (or even a mix) were contemporary.
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Old 07-21-14, 06:26 AM   #14
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Where are all these blue ones coming from? They're supposed to be predominantly white!
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Old 07-21-14, 06:31 AM   #15
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Sweet bike; I'd love to find one of these.
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Old 07-21-14, 07:17 AM   #16
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'70-'73 PX10

In '74 Peugeot moved the 531 decal from the seat tube to the down tube. Bikes with seat tube 531 decals have the 'Inoxydable' decal up high on the seat tube near the lug. When the 531 decal was moved to the down tube the 'inoxydable' decal was lowered on the seat tube.

As mentioned by 'auchencrow' lugs styles were comtemporary and mixed. I think that's 'peacock' blue versus the more common 'royal' blue. Steep frame angles were also contemporary with realxed frame angle. There seems to be no rhyme or reason as to when or why a particular geometry was used.
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Old 07-21-14, 08:33 AM   #17
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Big Chainring - it never occurred to me that it might be a Schwinn stem! There is a large "S" embossed into the side of the horizontal section just after it leaves the vertical riser piece. I just assumed it was a Simplex because of the bike's French heritage. The serial number under the BB is a six digit code starting with the number 9. I've read that there may be no way to reliably determine age from the serial number though...
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Old 07-21-14, 09:51 AM   #18
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The '72 PX-10 has a 7 digit serial number engraved on a narrow aluminum strip with a rivit, attaching it to the bottom of the bottom bracket, at each end.
My serial number begins with a '2', as do all other '72's I have seen. Just my experience, as an original owner.
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Old 07-21-14, 10:31 AM   #19
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My mistake on the seatpost (I have several other bikes on the go and confused the matter). It's (using digital vc's) 26.3-ish. No markings.

The head tube has the fancy lugs painted black. The top tube/seat tube is frame color and fancy on the top tube join. BB is plain lugs.

The badge is a foil decal with rivets, as noted. The 7-digit serial # is on an alloy plate rivetd to the BB (the shel of which has a drain hole) and starts with 1 (so perhaps a '71?), Cable routing above the BB via clip-on guides.

"Inoxydable" is up high (just above the Reynolds sticker) and the seat tube has the "Record du Monde" large white panel.

I haven't disassembled the stem/bars yet, but the Simplex RD is stamped "70". The stem is 22mm of course with the French headset. The headset still had grease and looks like it will be fine with a clean and new bearings (any info on bearing sizes?).

The BB seems smooth enough but I will try and have a LBS remove the cranks and the shells to check.

The seatpost may have originally been one of the "quill" types (I have one on another bike) and possibly was replaced by the original owner due to the difficulty in making adjustments. It's just a cheap chromed post but fortunately not rusted at all.

Anyone care to offer their opinion on those Reynolds stickers? 531 or 501?
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Old 07-21-14, 10:42 AM   #20
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...

Anyone care to offer their opinion on those Reynolds stickers? 531 or 501?
The former. I have never seen or heard of a 501 sticker that looks like that.
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Old 07-21-14, 10:49 AM   #21
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"Anyone care to offer their opinion on those Reynolds stickers? 531 or 501?"

As I mentioned in post #12 , Steve, the decal clearly indicates Reynolds 531. The green numbers are on the diagonal. On the 501 decal they would be horizontally placed, AFAIK. The "3" often looked like an "0" on some older decals.

By the way, exercise extreme caution at the LBS having the crank removed. Most shops do not have the proper puller for these old cranks and might ruin the threads. Make absolutely certain they have the proper size crank puller before proceeding. It is unlikely. In fact, if it were me, I wouldn't let them touch it. If you intend to keep the bike, invest in a proper crank puller.

The proper number of balls for the headset can be found with a little research on the internet. .
I could walk downstairs, dig out my Comp headset and count, but you can find out, with just a little work.

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Old 07-21-14, 11:04 AM   #22
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Reynolds 501 wasn't introduced until the mid-80's.

There's only a very loose correlation between the number of serial number digits and decade of production. 5=50's 6=60's 7=70's. This has been proven false many times and is NOT a reliable way to date a Peugeot prior to '78-ish when they began phasing in the new format.
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Old 07-21-14, 01:58 PM   #23
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Definitely not Reynolds 501 or a quill seatpost.
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Old 07-21-14, 01:59 PM   #24
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Reynolds 501 wasn't introduced until the mid-80's.
Thanks for the information all - and sorry I missed the first confirmation but I suppose it's best to be certain with IDs.

This would be a much older bike (by ten years or so) than I've worked with before. My only other Peugeot is newer (came with a Helicomatic freewheel and the quill seatpost, Nexus cranks) so I'm aware almost everything is unique in size. One reply on these forums suggest 5/32" bearings for the Stronglight so I will start there. I don't have a supply on hand, so will have to order. Also 5/32nds referenced here

Stronglight headseta

If I was to buy the proper crank tool, would you suggest the Stein @ $50+? Sheldon suggests a 23mm TA tool would probably work with care...

The RD is broken so I will need a new one... and so it begins :-)

Thanks again
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Old 07-21-14, 03:23 PM   #25
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The TA tool is kind of hard to find these days. I have the Stein tool and it's a good investment, if a bit expensive. A well-made tool. Order directly from Jim Stein and you can save about five bucks. And cut out the middleman.

I believe it is 5/32nds, Steve. 22 top and 22 bottom, as I remember. Buy a hundred of them, good ones, and fill the cups until no more will fit, flat, then remove one.
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