Model 25-7D Master clock with special dial, figures and hands. No.21285,International Time Recording Company Ltd., London, 1950-1959. It was electrically self-winding. The Master Clock was part of a Minutue Impulse Time System, which involved other time recorders which took their time from this one.

Details

Category:
Time Measurement
Object Number:
1965-177/1
Materials:
wood (unidentified), glass and plastic (unidentified)
Measurements:
overall: 1370 mm x 400 mm x 190 mm,
type:
clock
credit:
IBM United Kingdom Ltd.