How to identify what crankshaft you have

I am going from memory but and I m sure someone will correct me. I think id be looking at the balancer and converter for balanced vs un balanced also i think each has a different bolt offset but i may be wrong about that. That determines balance if its forged vs cat Im not sure if the marks are on the flange I think they aren't the flange and snout are machined etc. so no forging marks etc. if the crank is out there is numbers on it etc.