Might 900 and Ritchey logic are both Similar cranks, both made by Sugino.
Top end cranks for the time.
Talking mid to late 90s here.
ATB/traditional the 110/74 BCD called the Logic Mountain
CD the 94/58 BCD called the Logic Compact
All design with a Q-factor on their BB of 151mm (usually 107mm for this style of crank with the style of stays back then.)
Road, this also use a compact Road with 110 BCD, but Q factor down to 138 with a road setup.
Unfortunately without the cranks erm no idea what the call it (it's profile), bb to pedal axle info then it guess work as to how it'll work out.