Category:Corona adding machines
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Media in category "Corona adding machines"
The following 2 files are in this category, out of 2 total.
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Corona adding machine - Ridai Museum of Modern Science, Tokyo - DSC07535.JPG 3,462 × 5,086; 9.01 MB
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Corona adding machine - Ridai Museum of Modern Science, Tokyo - DSC07546.JPG 3,408 × 4,719; 7.32 MB