850 flywheel

Hi, I need to confirm if one of my "on the shelf" crank is a 850 or not, so I have seen that you could grind 850 crank, bolted cause the flywheel is thinner than the 750 ( cdo and atlas), I have one 850 (sure cause of the cheeks which are differents), but the other had been made by me years ago with 750 Atlas cheeks and possibly a 850 flywheel, the bottom width are the same 58.9mm ( ish ) or (for you 2.32"), thus letting the grind wheel passing over, is someone could confirm my measurements .....?

750 flywheel is more than 63 mm (2.500") so yours is an 850.

Hi thank you for your reply ......have a nice day, Pierre.