My german dienstglas binocs came with these eyecups, they're made of brass and screww on perfectly. Anyone any idea what they were specifically used for, I know some came with shallower bakelite types. Many thanks, Roland.
My german dienstglas binocs came with these eyecups, they're made of brass and screww on perfectly. Anyone any idea what they were specifically used for, I know some came with shallower bakelite types. Many thanks, Roland.
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