https://www.nfsa.gov.au/sites/default/files/2024-12/354298_1006%20Don%27t%20Ask%20poster_1000x745%20px.jpg
A-wind
A way of denoting perforation position in single perforation raw stock. Used in 16mm and 8mm.
https://www.nfsa.gov.au/sites/default/files/uploads/2010/09/13/awind.jpg
References
Kodak 1999
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