watches over rings?

[vintagesub]

Me and my fiancee have been discussing the idea of giving each other watches over rings on our special day. We could still use traditional wedding bands for the ceremony, but I thought it was a cool idea, especially as she came up with it! Although we have no official date set, It might mean I could own the day-date I so long for, a bit sooner than I had originally expected.
I wondered if anybody had heard of anybody doing this or anything similar, and what you thought/think of the idea.