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細節
A Layton's Improved Arithmometer,
1914 Model, with nine slides, sixteen-digit capacity, alloy bedplate, slide-zeroing button and mahogany case -- 24 in. (60.5cm.) wide, with descriptive booklet
1914 Model, with nine slides, sixteen-digit capacity, alloy bedplate, slide-zeroing button and mahogany case -- 24 in. (60.5cm.) wide, with descriptive booklet