Bob Jackson Serial Numbers
07-20-10 | 12:40 PM
#27
This sounds very suspicious to me. Your frame number sits right in the 70s triangle frame puddle; they must have built a crapload of mixtes in the 50s to get to 11000+, or else their serial numbers are assigned by a random generator!
07-20-10 | 12:42 PM
#28
Senior Member
Joined: Aug 2003
Posts: 13,973
Likes: 145
From: Tampa, Florida
I think the Reynolds guy was being lazy or didnt want to be bothered with a mundane inquiry or misread my serial number or fat fingered the key board. Mine has the 'Reynolds Tube Co Ltd" decal so it would be '73-ish to '77-ish.
07-31-10 | 11:23 AM
#29
Senior Member
Joined: Aug 2005
Posts: 307
Likes: 0
From: Northern Virginia
It is not my intention to make a plug for my Bob Jackson frame on Ebay... I am the second owner of a frame numbered 10046 and I was told by the original owner that he bought the bike in the early 70's.
There are lots of photos on my listing if you want to take a look:
https://cgi.ebay.com/ws/eBayISAPI.dll...STRK:MESELX:IT
Original owner had braze ons put on. Bike has been re-painted and there are no stickers on the frame.
My frame/fork looks identical to this other frame on bikeforums numbered 13473:
https://www.bikeforums.net/classic-vintage/437580-bob-jackson-yard-sale-find.html
There are lots of photos on my listing if you want to take a look:
https://cgi.ebay.com/ws/eBayISAPI.dll...STRK:MESELX:IT
Original owner had braze ons put on. Bike has been re-painted and there are no stickers on the frame.
My frame/fork looks identical to this other frame on bikeforums numbered 13473:
https://www.bikeforums.net/classic-vintage/437580-bob-jackson-yard-sale-find.html
07-31-10 | 11:37 AM
#30
There are two holes for water bottle brazes but it looks like they were added later? The rear DO is a long Campy. Everything as you see is how I picked it up. I am going to strip it of parts soon. Funny about the cable guide. The serial of another frame 11042 was dated 1974 and this number is 10812 so I would assume it is pre 1974. Make sense?
Guy
Guy
They were cranking them out, (I think they must have subbed some too) in 1975 Bikecology in Santa Monica bought a big load of them and we stopped ordering.
My suggestion is to be careful and inspect the bottom bracket as it goes together if you use a typical period assembly, the shells were often distorted, the shell faces were not parallel and a cup would seat but not perpendicular to the spindle. If that is a problem then using a Phil Wood BB or similar will solve the problem.
09-13-10 | 10:15 AM
#31
car guy, recovering
Joined: Nov 2008
Posts: 1,255
Likes: 9
From: Mount Vernon, NY
Bikes: Olympia Competizione & Special Piuma, Frejus track circa 1958, Dahon Helios, many others
https://www.flickr.com/photos/2816407...th/4977338047/
I bought this tandem last week. s/n 15309. As far as I can tell, it is from around 1980. Since Unworthy1 has 15305, I thought it might be fun to compare two bikes only 4 digits apart.
I bought this tandem last week. s/n 15309. As far as I can tell, it is from around 1980. Since Unworthy1 has 15305, I thought it might be fun to compare two bikes only 4 digits apart.
08-01-16 | 12:45 PM
#33
Señor Member
Joined: Oct 2004
Posts: 18,481
Likes: 1,565
From: Hardy, VA
Bikes: Mostly English - predominantly Raleighs
I just go this e-mail from the Bob Jackson factory:
"Yes sorry about that.It happens that cards get lost or removed and not put back correctly over the years.
From the master sheet I can tell you the frame was built for a Mr.C.Pratt in March of 1975. (33 years old)"
Fun to know.
"Yes sorry about that.It happens that cards get lost or removed and not put back correctly over the years.
From the master sheet I can tell you the frame was built for a Mr.C.Pratt in March of 1975. (33 years old)"
Fun to know.
__________________
In search of what to search for.
In search of what to search for.
08-01-16 | 08:26 PM
#34
self propelled lifer
Joined: Aug 2007
Posts: 557
Likes: 12
From: Manitoba
Bikes: 1962 Dawes Galaxy; 72 Gitane Interclub;73 Peugeot PR10;78 Torpado Luxe;73 Grandis; 81 Raleigh/Carlton Comp; 85 Bianchi Stelvio; 87 Bianchi Brava; 73 Bottechia Special; 1969 or70 Bob Jackson
The serial number on mine is 6832. I guessed around 1970, the Bob Jackson factory said Quote..." such an old frame I have no idea on that one" . I'll be interested to see if anyone can shed more light on it's actual age.
06-04-22 | 10:21 AM
#35
Member
Joined: May 2022
Posts: 29
Likes: 6
From: Cincy
Bikes: Opus Counterpoint(1986), Guerciotti Jet(1983), Bob Jackson(1972), Atala Pro(1973?)
I know this is an old thread but will add my knowledge of my current BJ.
Serial 9227 shipped to original owner at Offutt Air Force Base, July 1972. I have the original BoL with the dates.
Serial 9227 shipped to original owner at Offutt Air Force Base, July 1972. I have the original BoL with the dates.
06-05-22 | 12:54 PM
#36
Newbie
Joined: Sep 2009
Posts: 36
Likes: 24
From: Northern California
Bikes: 1996 Quattro Assi, 2010 LOOK 566
Another Bob Jackson serial number.
Another Bob Jackson here. After a few hours scouring off rust it looks to have the serial: 20543
I have no idea when it was built. From what I am seeing with other serials posted it should be late 80's or early 90's.
I have no idea when it was built. From what I am seeing with other serials posted it should be late 80's or early 90's.
06-05-22 | 04:34 PM
#37
Junior Member
Joined: Dec 2019
Posts: 160
Likes: 187
From: SANTA CRUZ
Bikes: 82 Univega Specialissima, Bike Friday Pocket Rocket, Kona Wheelhouse, Rocky Mtn Thunderbolt, Viner Strada Bianca, ~73 Bob Jackson, ~75 Volkscycle Mark100.
So I am curious about how these serial numbers work... serial 1248 on mine. I know my bike is at least 1976 or older, as my friend bought it used that year. Any thoughts?
06-07-24 | 09:47 AM
#38
Newbie
Joined: Apr 2023
Posts: 7
Likes: 0
Thread resurrection time!
I've just bought a frame as a runaround, but it's pretty nice, possibly better than my Mercians! it is actually very Mercian like though.
The frame number is 11078 and at a guess I'd say its very early 80's.
It has been resprayed by Barrons in the mid plus 80s.
It's 531. 100/125 OLN. 68mm BB. 27.2 post. Gear cable guides are on top of BB shell. Campagnolo horizontal drop outs, the shorter type. 1 set of bottle bosses. Braze on D/T shifters.
Drillings for hex bolt mount calipers. And the frame is close mudguard clearance.
I just need to upload some images.
A Jackson ?
I've just bought a frame as a runaround, but it's pretty nice, possibly better than my Mercians! it is actually very Mercian like though.
The frame number is 11078 and at a guess I'd say its very early 80's.
It has been resprayed by Barrons in the mid plus 80s.
It's 531. 100/125 OLN. 68mm BB. 27.2 post. Gear cable guides are on top of BB shell. Campagnolo horizontal drop outs, the shorter type. 1 set of bottle bosses. Braze on D/T shifters.
Drillings for hex bolt mount calipers. And the frame is close mudguard clearance.
I just need to upload some images.
A Jackson ?
Last edited by Jiveman; 06-07-24 at 10:19 AM.
