hi danie

nice camera ! not sure if it has been adapted for 120
you might have to re-spool a roll to find out
as for how many winds to the next frame, you might have to experiment
a little to figure that out too ...

i have a graflex autograpic 3a ... and wind PAPER on the spools instead of film.
lots of fun to shoot paper negatives that are 3.5x5.75 easy to process .. usually 1sec
(sometimes less time ) in bright sun is a good exposure.
have fun with your new camera !
john