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:
- 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
Download catalogue entry as json
View manifest in IIIF viewer
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.