The Imperial 1170 Oven Mechanical Timer is a manually operated 60-minute control used to manage cooking cycles in commercial oven equipment. It works through a spring-driven countdown mechanism that activates when the dial is turned, automatically switching or signalling the oven circuit once the selected time ends. Featuring a .187" D-stem for knob attachment and 1-1/8" centre mounti... https://www.partsfe.co.uk/imperial-1170-60-minute-mechanical-timer-w-187-d-stem-1-1-8-ctrs-mt-screws