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re: What is your favorite Christmas gift that you received this year?
Posted on 12/28/14 at 11:21 am to madamsquirrel
Posted on 12/28/14 at 11:21 am to madamsquirrel
quote:
What is the purpose of rubies inside? Serious question.
They act as bearings for some of the moving parts. Synthetic ruby (corundum) is common - very hard and smooth. In finer watches, in addition to being functional, provides a very nice visual element to the watch movement - of course some watches you can see this in the case of a sapphire back, and in some only if you remove the case back.
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