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Name that frame! Early 70s

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Name that frame! Early 70s

Old 06-18-10, 04:16 PM
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Name that frame! Early 70s

I am still trying to ID this frame. I just started ripping into it and I would love to know what it is when I get done. The bike has a mix of Dura-Ace and Campagnolo parts from around 73.

Seat post is 27.2

BB is 37x24

Serial number is 052 located on the left side on the BB shell

Headset is a EDCO

Dropouts are Campagnolo















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Old 06-18-10, 04:43 PM
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that would have to be 36 x 24 (Italian) and looks very nice but:
very unusual for an early '70s Italian to have under-BB cabel guides and all those cable stops... the braze-on shifter bosses might just squeek by as
"period correct", plus they seem interesting given the round [is that early Shimano 600?] rather that square elements on the tube.
Interesting fork crown too....too bad I got no idea for you!
With all this unusual-ness I am tempted to call "American Custom Builder".

Last edited by unworthy1; 06-18-10 at 04:46 PM.
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Old 06-18-10, 04:47 PM
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Shifters were Dura Ace.

Just checked. The BB is in fact a 37x24 Shimano

Also noticed the front drops are Campagnolo also

Last edited by that_guy_zach; 06-18-10 at 04:52 PM.
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Old 06-18-10, 05:24 PM
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Originally Posted by that_guy_zach
Shifters were Dura Ace.

Just checked. The BB is in fact a 37x24 Shimano

Also noticed the front drops are Campagnolo also
OK so that's 1.37" x 24...not Italian but regular Brit-enese. I didn't know that DA used the weird bosses that are usually associated with early 600...or are those not part of the braze-on but just the slide-on elements that came with the DA shifters? can't tell from the pic. Still can't ID it, but won't be looking under the "Italian" category.
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Old 06-18-10, 08:03 PM
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Proteus build kit?
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Old 06-19-10, 09:50 AM
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^sure could be, but since it has a "52" on the shell, one would assume it's from a small-output builder who built at least that many frames (and the craftsmanship looks better than a hobbyist would do). There's something about the forkblades that look a little more "531" than "Columbus" to me...also appears that the chainstay bridge is an oval tube (longways up) and not a standard round tube.
BTW: as to the age of this, in spite of the long Campy DOs, and the cable stops I don't think this could be an early '70s frame...even if there are later-added bits (like the shifter bosses and under-BB worm tubes) the seat lug and forkcrown both look like IC items...I'm guessing a mid-to-late '70s vintage, could even go to very early 80's from a custom job.

Last edited by unworthy1; 06-19-10 at 10:12 AM.
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Old 06-24-10, 06:22 AM
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Originally Posted by JohnDThompson
Proteus build kit?

I have found a couple of pictures of Proteus bikes but cant find anything that looks like this one. Should be on the road next week if all goes well.
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Old 06-24-10, 07:14 AM
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Early 1980s Japanese?
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Old 06-25-10, 07:40 PM
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I plan on changing and redoing a couple of things, But its done for now. I am super happy I just need to find those cheap Campagnolo replics hoods.



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Old 06-25-10, 11:29 PM
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Originally Posted by that_guy_zach
I just need to find those cheap Campagnolo replics hoods.
If by "cheap" you mean $50, then just contact Robbie Fellows at rnitro1969@aol.com
he's taking orders and homebrewing a batch right now...it's cheaper if you can get an order of 3 pair together, so ask your friends.
Otherwise, it's the old EAI greasy hoods from various sources.
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Old 06-26-10, 04:18 AM
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Some design features are similar to my Witcomb USA which I had built around 1976 or so.
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Old 06-26-10, 05:37 AM
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I was looking at a set on Ebay for 23.00. Are those the EAI? I am still new to this.
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Old 06-26-10, 06:53 AM
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Affirmative. You will be much more satisfied if you get Robbie Fellows' repros, or else find a set of Modolo 919 or 920 hoods on eBay -- they fit perfectly, and I like the “anatomic” ones better than original Campagnolo. Suntour Cyclone/Superbe/Sprint would fit too, but you almost never see those.
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Old 06-26-10, 08:16 AM
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I'm pretty sure this is an early 80's frame, not an early 70's frame. That's about when shifter bosses were brazed on. The 70's had clamped-on shifters and clamped on bottom bracket cable guides.
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Old 06-26-10, 08:40 AM
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From what I can gather from Velobase the Shifters are first gen Dura Ace sold from 73-77 as clamp on or Braze on. The crank is a 172.5 Dura Ace and those were available after 75. Thank you for the help with the hoods, I am gonna keep searching.
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Old 06-26-10, 09:39 AM
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I think it's an english bike because of the rounded over seat stay tops, posibly some kind of raleigh. Or, it couls also be a Motobecane.
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Old 06-26-10, 11:38 AM
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I think common production bikes have been narrowed out.
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Old 06-26-10, 05:53 PM
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Originally Posted by noglider
I'm pretty sure this is an early 80's frame, not an early 70's frame. That's about when shifter bosses were brazed on. The 70's had clamped-on shifters and clamped on bottom bracket cable guides.
Although braze-on shifter bosses were not common before the late 1970s, they were nonetheless available long before then. Campagnolo catalog #13 from 1955 shows them as part #660 on page 19 (actual page 19 or page 21 of this pdf of the catalog): https://www.campyonly.com/history/cat...catalog_13.pdf

AFAIK, the under-the-bottom-bracket cable tunnels did not appear until the late 1970s.
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