I've posted this bike to this forum before, but I need some more detailed information on the specifications than last time. The bike is a 62 cm Motobecane Super Sprint made with 2040 tubing. Diacomp breaks, Aero Coronado cranks, Thuret derailleurs and shifters.

I've been scouring the internet for details on BB threading and spacing, but can't find it anywhere. I've read in several places that older Moto's such as this one had Swiss threading. If so, does this mean that I will need to get a new BB before I can install updated cranks? Will any BB work as far as a replacement is concerned?

Any help will be much appreciated.