Watchman's Control Clock, 1930-1959

1930-1959 in London

Buy this image as a print 

License this image for commercial use at Science and Society Picture Library

Science Museum Group
© The Board of Trustees of the Science Museum

IBM Watchman's control clock, model 3750 no.28152, 1930-1959. It was used to monitor the patrol of night-watchmen. By inserting a key into the key station clock, the time was recorded and safe from tampering.


Time Measurement
Object Number:
leather, paper (fibre product) and steel (metal)
time recorder
IBM United Kingdom Ltd.

Cite this page


We encourage the use and reuse of our collection data.

Data in the title, made, maker and details fields are released under Creative Commons Zero

Descriptions and all other text content are licensed under a Creative Commons Attribution 4.0 licence

Using our data


Download catalogue entry as json

View manifest in IIIF viewer

Add to Animal Crossing Art Generator

Download manifest IIIF

Our records are constantly being enhanced and improved, but please note that we cannot guarantee the accuracy of any information shown on this website.