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Burroughs Style 1 Class 3 Adding Machine


Burroughs “Portable” Adding Machine

Serial No. P167094S

Date: 1950s/60s

Price paid: £2.99

‘Portable’ only relative to it predecessors, this machine weighs more than 10 kilograms.  The ‘S’ in the serial number probably stands for Sterling currency.  This machine has been converted to decimal currency, which was introduced in the UK in February 1971, and the blanks where the 11 penny keys once were can clearly be seen.

This example was made in Scotland.


Olivetti Summa Prima 20

Serial No.

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