Sumlock Comptometer 993S Model 912/VZ/S/933.896.
A 10-decade, decimal Comptometer, electrically driven, with storage (memory).
Model number 912/VZ/S/933.896.
Made in Great Britain by Bell Punch Company Ltd.
This machine has the standard full keyboard with 12 decades of keys (1 to 9). As usual on Comptometers, pressing a key adds that number to the accumulator register, as shown in the lower row of windows, here showing 12300000.
Our thanks to www.vintagecalculators.com/ for the use of the cutaway pictures
This exhibit has a reference ID of CH1315. Please quote this reference ID in any communication with the Centre for Computing History.