FR232E -
New photographic shutter with variable exposure time for a determined initial speed, and itself adjustable, shutter blades or shutters
- Google Patents
New photographic shutter with variable exposure time for a determined initial speed, and itself adjustable, shutter blades or shutters
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FR232D1901-04-061902-03-15
New photographic shutter with variable exposure time for a determined initial speed, and itself adjustable, shutter blades or shutters
ExpiredFR232E
(en)