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Anyone recognize these lugs?

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Old 03-21-24, 10:18 PM
  #1  
jPrichard10 
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Anyone recognize these lugs?









I don't see any markings in the dropouts. Really faint serial number (short number) on the underside of the he bb shell. English threaded bb. 27.0 seatpost. No fork.

Any guesses?
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Old 03-21-24, 10:59 PM
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I just ID'd some similar as "Prugnat ? with windows" but I think I was mistaken. Now I think these are Bocama (BCM) Competition.But seeing Bulgie's comment below, I correct my correction! With the rest of the details I have no idea what the make is, could be dozens but it's double-butted Imperial tubing like 531, Columbus SL or Vitus and with Brit BB threading more likely 531. The mitering inside the BB shell is pretty well done!

Last edited by unworthy1; 03-22-24 at 08:37 AM.
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Old 03-22-24, 04:30 AM
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Prugnat S4.
To see them at their finest, feast your eyes on this Brian Chapman from a few years ago, a stunner.

They don't get used much anymore, like in the last 40 years, 'cuz framebuilders nowadays are all lazy!

Last edited by bulgie; 03-22-24 at 04:35 AM.
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Old 03-22-24, 06:19 AM
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The cut out reminds me of Losa with a slightly exaggerated V shape but as a BSA bike, most certainly not.
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Old 03-22-24, 06:29 AM
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My Bob Jackson w/ Reynolds 753 is lugged identically. Anyway would be of interest to know the lug manufacturer too..
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Old 03-22-24, 07:22 AM
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-----

have not before seen this seat stay bridge with the hexagonal front

appears framebuilder may have brazed a hex nut to the front of a stock bridge from someone such as Haden

we certainly appear to be in the UK here

this bridge detail might be a helpful clue in determining a specific maker

perchance one of our framebuilder members or @MauriceMoss may have seen it previously...


-----
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Old 03-22-24, 07:38 AM
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Originally Posted by juvela
-----

have not before seen this seat stay bridge with the hexagonal front

appears framebuilder may have brazed a hex nut to the front of a stock bridge from someone such as Haden

we certainly appear to be in the UK here

this bridge detail might be a helpful clue in determining a specific maker

perchance one of our framebuilder members or @MauriceMoss may have seen it previously...


-----
I was thinking low countries?

To be more clear, I'm trying to identify the frame builder here, not just the lugs.
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Old 03-22-24, 08:32 AM
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Originally Posted by jPrichard10
I was thinking low countries?

To be more clear, I'm trying to identify the frame builder here, not just the lugs.

-----



yes, that be the point o' me observation

wrt low countries, chain stay stop could be a clue...

it does not look like a Nr.621, similar but different


-----

Last edited by juvela; 03-22-24 at 08:35 AM. Reason: addition
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Old 03-22-24, 09:34 AM
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Someone on Facebook suggested Eisentraut, and I don't think they're correct but it is the closest seatstay cap match so far:




Brake bridge looks different, but I guess we can consider some American builders as well.

​​​​​
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Old 03-22-24, 10:28 AM
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From my Bob Jackson Reynolds 731.
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Old 03-22-24, 11:10 AM
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Originally Posted by Bobjackson

From my Bob Jackson Reynolds 731.
Interesting, I've only ever seen the fastback seat stays on Bob Jackson frames. I think Bob Jackson made a lot of the Eisentraut Limiteds, so makes sense it would match above.

What seatpost does this take? And what does the serial number look like?
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Old 03-22-24, 11:25 AM
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27mm seat post.
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Old 03-22-24, 12:35 PM
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Originally Posted by Bobjackson

27mm seat post.

D'oh! I was confusing Bob Jackson and Bruce Gordon.
Here's a Bob Jackson track frame that looks similar as well:


Last edited by jPrichard10; 03-22-24 at 12:40 PM.
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Old 03-23-24, 10:31 PM
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And a photo of AZORCH 's BJ:



Is this the leading theory now?

AZORCH if you still have it, what does your rear brake bridge look like?
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Old 03-23-24, 10:40 PM
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Originally Posted by bulgie
Prugnat S4.
To see them at their finest, feast your eyes on this Brian Chapman from a few years ago, a stunner.

They don't get used much anymore, like in the last 40 years, 'cuz framebuilders nowadays are all lazy!
That bike is absolutely unreal.
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Old 03-24-24, 01:32 AM
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Originally Posted by bulgie
Prugnat S4.
To see them at their finest, feast your eyes on this Brian Chapman from a few years ago, a stunner.

They don't get used much anymore, like in the last 40 years, 'cuz framebuilders nowadays are all lazy!
Thats a funny message on the steerer.
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