Model with quick subtraction device
|Caption||Model with quick subtraction device. Illustration for Harmsworth’s Business Encyclopedia and Commercial Educator (c 1926).|
|Artist||English Photographer (20th Century)|
|Artwork medium||black and white photograph|
|Copyright notice||© Look and Learn|
|Keywords||history historical 1920s business commerce commercial trade twenties machines calculation mechanical Model quick device Comptometer Felt Tarrant Company adding calculating machine subtraction levers keyboard cancelling handle|
|Image ref||Maximum size available||Views|
|M460617||3,908 x 4,095 pixels||0|
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