Identifying a custom bike maker?

BikeBuilder

Dirt Disciple
Greetings all,

First (and I am sure you get this all the time) apologies as this is my first post and I am asking a question. I am reasonably informed when it comes to building bikes and to a lesser degree riding them. I regularly scour the forums should I come across something new for further information.

I have just purchased a frame to build up another bike. I like to know what I am building up. The frame looks a good quality (nothing fancy) steel lugged frame. Nice and light. It has braze on down tube, front derailleur, no mudguard fixings, a lug for the pump on the head, a strange lug on the rear derailleur stay down arm?? It is spaced at 130mm rear and appears ready for modern brakes.

The frame has been repainted quite nicely but the chap I bought it from inherited it from a deceased friend and new nothing about it. No decals but the front derailleur is attached (appear to be croce d'aune 1988-1991) with a Campy Chorus headset and 3ttt quill stem.

Anyway....My question is I cannot locate any serial number or manufacturers marks which I can identify. The only marking are on the BB which you expect, they are however unfamiliar to me.

To one side of the BB appears to be hand stamped (as in the stamping is not all aligned) this first appeared as 50G however on very close inspection is 5CG. on the other end of the BB is simply a larger font 7.

Any ideas?

Many thanks for any help and apologies for all the information.

BikeBuilder.
 
Pictures always help :). The small button on the seat stay is to hang the chain when you change the wheel

Shaun
 
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What is stamped under the bottom bracket? Or maybe a rear drop out?
 
Re:

the fork steerer tube often has a matching stamped number if they are original to the frame, this may yield some information if you remove them....

Griff
 
May have been a generic frame made for a shop for them to deacal up, cables down the left if the top to be are for Campag or similar, under BB routing and external cabling plus brazed on front mech put it after my time. Early 90's maybe?

Looks a little Italian around the seat cluster, does it have an English threaded 68mm bottom bracket or italian 70mm?

Looks nice though

Shaun
 

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