I just bought a complete Galvin system. It came with a Horseman 6X9 back. I used to own a Mamiya 645 a number of years back and those backs(film inserts) were c learly marked as to where to prewind the arrows on the paper backing of a roll o f film when reloading it. The Horseman back is not marked. There is a round hole in the pressure plate though. Is this the prewind point when loading. If not, w hat is the start point on the film transport?? Thanks for your help in advance!! !
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