Which Maxwell windlass do I have?

[recppd]

ON the Maxwell unit itself there is a number where the crank handle goes. That number, I believe will be a 600 or 800. That's the model number. On my 38 Open its a Maxwell 800....M2C

Okay thanks.  I'll look but I didn't see a number jump out at me.  Even with the number, how do I determine which chain wheel is installed?  I believe it's 5/8" 8 plait with 5/16" chain, but I want to verify before ordering a whole new setup.  The stamp on the chain only tells me it's G4, not the size.  I'll take a closer look tomorrow.