Kodak Eastman 35mm Movie 3 Rolls Film Reel Box Case -We Belong Together-Film

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Is there a way to tell if these film canisters are empty? (More details in the comments) : r/AnalogCommunity

Kodak Eastman 35mm Movie 3 Rolls Film Reel Box Case -We Belong

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2 VINTAGE EASTMAN Kodak Movie Film Reel Shipping Case Containers