I actually had picked up a 1970s BJ frameset on eBay, over 5 years ago. Seller said it was originally all Nuovo Record Gruppo but with the exception of the BB and headset he'd transferred it all over to a different bike, years earlier. Sure enough, the fading on the original paint (Orange) clearly outlined Campy's distinctive clamp profiles, so this was an easy rebuild.

Not certain of the year, but mine is beautifully aligned and no problem with the BB shell. All Pumpkin orange with black head tube and black seat tube bands, black lug outlining and little hand painted black scrollwork on the seatstay caps. Very nice solid, stable riding bike, and nicely faced BB, etc. - wish all bikes were so well built.

Actually, rather surprised that (well, in spite of the distinctive color) it really exhibits nothing very ostentatious to draw one's attention to it. DB-531, Campy 1010 dropouts, long spearpoint Prugnat Professional lugs, semi-sloping fork crown with drilled stiffeners on the inner sides of the fork blades & seatstay bridge supports with windows... & no chrome. Just very clean looking, overall.

Suppose I really should remember to write or call the UK shop to see about accurately dating it. Or, since I'm already following this thread,... anyone happen to know of an online a source for approximating a BJ build date based on serial numbers? ~ Thanks