I just acquired an old path bike that I'm trying to find out some background on.
It's been repainted by Bob Jackson in yellow. The bloke I bought it off said it had the remainders of the original decals on, but they were falling off... he could kind of make out a few letters that he thought may have read 'Wilkinson' or something similar. It did have the original 531 sticker on it, so I know it's 531 tubing.
The bottom bracket has 18805 stamped on it, and then 187 upside down from that.
Here's some pics of the frame detail (if you click 'all sizes' you can get bigger pics):
http://www.flickr.com/photos/39642960@N ... 259546501/
One concern I do have is that the underside of the bottom bracket is flat, kind of like a big dent, but it is such a perfect dent that it seems like it's supposed to be like that. It's right where the serial number is. Could it have been from the force of the stamping the serial number? Or is this just how the frame is? It's a strange place to have such a dent, as the cranks will always prevent anything from hitting....?
Here's a pic, it's blurry but you can see the shape of the tubing quite well: