Clock winding keys are available in different numbers (e.g #6 or #10 etc). These numbers represent the size of the winding shaft of your clock, which will in turn tell you which key to purchase. In order to find out what size key you require you’ll have to measure the thickness of your winding key shaft in your clock using a vernier caliper, then refer to the picture below to purchase the relevant key.
https://www.clockshop.com.au/parts/winding-keys/
Important Note: make sure to order one size above your measured shaft size. So if your clock's measured winding shaft size is 2.75mm, you should order Key #3 (3.00mm) so the key fits over the clock's winding shaft.
Important Note: make sure to order one size above your measured shaft size. So if your clock's measured winding shaft size is 2.75mm, you should order Key #3 (3.00mm) so the key fits over the clock's winding shaft.
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