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PostPosted: Wed Dec 16, 2020 5:17 pm 
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A local friend gave me a GB bike with clear Charlie Roberts stamps on forks and frame with Geoffrey Butler decals. Unfortunately I can’t locate serial number - I think it was in the drop out and was worn, but I’ve noted a distinct drilling marks in the bottom bracket shell. Does anyone know what was an approximate date this was made? It also has drilling’s in spear luggage which apparently marked Roberts frames ? Appreciate your help.


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PostPosted: Thu Dec 17, 2020 5:43 am 
r.B.o.T.M. & P.o.T.M. Winner
r.B.o.T.M. & P.o.T.M. Winner
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No stamping on the forks main steerer tube?


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 Post subject: Re:
PostPosted: Thu Dec 17, 2020 8:36 am 
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Not sure. Didn’t check yet. Good idea. Thanks


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PostPosted: Thu Dec 17, 2020 8:42 am 
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Location: Cumbria
70's Drillium most likely, above BB guides and nutted brakes.


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 Post subject: Re:
PostPosted: Thu Dec 17, 2020 9:47 am 
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That places it firmly in 70ies?


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 Post subject: Re:
PostPosted: Thu Dec 17, 2020 1:09 pm 
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I have no idea about Roberts-specific details. On general or generic(?) details I'd say 1973-5? Could even be earlier, but I don't know when those branded seat stay caps and fork crowns became commonplace. On the evidence of those I might have have gone for later seventies, but the rest of the features suggest earlier. If it is racing geometry with long Campag ends then imo unlikely to be later than say 1977.
That's a nice thing to get given.. :)
Check the stack-height, bracket-shell width, seat post diameter, and OLN?


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PostPosted: Thu Dec 17, 2020 2:14 pm 
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Hi, I think based on website information that cooperation between Charlie Roberts and John Pratt started around 1966 when the garden shed behind GB shop was mentioned, but the pencil stays suggest 70s when Roberts apparently adopted them for some Aussie cyclists.

The bike was actually a swap for a MTB so now trying to rebuild it using period collect bits. It originally came with Suntour V Luxe derailleur and Campg lookalike Shimano shifter.


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PostPosted: Thu Dec 17, 2020 3:57 pm 
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Yep, towards the end of the 70’ start of the 80’s the Portacatena rear dropouts appeared .....


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 Post subject: Re:
PostPosted: Thu Dec 17, 2020 4:08 pm 
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Those V-Luxes are OK.. probably out-performs a Nuovo Record, except with the obvious aesthetic and kudos penalty.. :)
My advice- which you may or may not need and will probably ignore anyway- Resist the urge to get the rear end re-spaced to accommodate a load of post-seventies sprocket-proliferation, and equally resist the urge to counterbore the brake holes to accommodate allen key fixings..


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 Post subject: Re: Re:
PostPosted: Thu Dec 17, 2020 4:58 pm 
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torqueless wrote:
Those V-Luxes are OK.. probably out-performs a Nuovo Record, except with the obvious aesthetic and kudos penalty.. :)
My advice- which you may or may not need and will probably ignore anyway- Resist the urge to get the rear end re-spaced to accommodate a load of post-seventies sprocket-proliferation, and equally resist the urge to counterbore the brake holes to accommodate allen key fixings..


I certainly will not ignore it as it sound very sensible to me. The only problem is that the original nice wheels - Campag big flange on champion competition rims have spikes rusty beyond repair so not too sure what to do with them.
And yes - I’m tempted to put campag Nuovo Gran Sports on which sit in my tool box and doing nothing.


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