Just got my "new to me" YashicaMat F and need help with advancing film. What is the correct proceedure? My old C of years ago (I think that was the model) still used the window in the back. Now I need to know what to do with the crank only.

How many cranks on first exposure? Needless to say, no manuals with this unit! What happens with the crank? Does it lock? Does the little serrated wheel in the top measure film movement? Inquiring minds need to know.