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THE ADDER KEYBOARD CALCULATION MACHINE No 6243, London: The Adder Cash Register Syndicate Ltd, c.1903, with 2 rows of 5 keys from 1-10, zero key, 3 window display, case in brushed finished shaped metal over cast metal, image 1
THE ADDER KEYBOARD CALCULATION MACHINE No 6243, London: The Adder Cash Register Syndicate Ltd, c.1903, with 2 rows of 5 keys from 1-10, zero key, 3 window display, case in brushed finished shaped metal over cast metal, image 2
THE ADDER KEYBOARD CALCULATION MACHINE No 6243, London: The Adder Cash Register Syndicate Ltd, c.1903, with 2 rows of 5 keys from 1-10, zero key, 3 window display, case in brushed finished shaped metal over cast metal, image 3
THE ADDER KEYBOARD CALCULATION MACHINE No 6243, London: The Adder Cash Register Syndicate Ltd, c.1903, with 2 rows of 5 keys from 1-10, zero key, 3 window display, case in brushed finished shaped metal over cast metal, image 4
Lot 42

THE ADDER KEYBOARD CALCULATION MACHINE
No 6243, London: The Adder Cash Register Syndicate Ltd, c.1903, with 2 rows of 5 keys from 1-10, zero key, 3 window display, case in brushed finished shaped metal over cast metal,

5 November 2020, 10:00 PST
Los Angeles

Sold for US$1,147.50 inc. premium

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THE ADDER KEYBOARD CALCULATION MACHINE

No 6243, London: The Adder Cash Register Syndicate Ltd, c.1903, with 2 rows of 5 keys from 1-10, zero key, 3 window display, case in brushed finished shaped metal over cast metal, in original brown leather traveling case with blue velvet lining, 170 x 110 x 113 mm (6 3/4 x 4 1/4 x 4 1/2 inches).
Provenance: The Computer History Collection of Serge Roubé.

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