70mmback understanding-manipulating pre-shooting-Unperforated film

[michael_przewrocki2]

<p>I have three 70mm-backs, one is defective and i have killed the film-counter-wheel-mechanisme when filing down teeth for Unperforated-film-use.by force i could release the rivited holder-unit but cannot use it anymore because its unrepairable, warped.<br /> No camera available but i have instructions from The Hasselblad manual by wildi 1986<br /> on one of the others i had filmcounter stuck at 20. its now at zero. it seems it will be set back when holder is removed.<br /> a) how can i make filmcounter run without having a camera? Is it possible.<br /> b) how is o-ring mounted onto filed-down film-counter-wheel? its holder-unit with axis is riveted.<br /> have now a working unit with wheel filed down.<br>

without counter working: one turn of film-advance know equiv. 1 image. hope also after 50 shots.</p><div></div>