VERY UNUSUAL SPINNING WATCH FOB WITH GOLD CHAIN

You have to see this to fully appreciate it. I believe it belonged to my grandfather since he was a Mason as well as a watch maker. I have not seen anything like this before and find it fascinating.
The gold chain is 15 inches long and the 1.5 inch spinning disk has a black background with gold inlay to form the pattern as it spins. It has decorative gold filigree with a black background on the disk holder also.
This will be a treasure for some fortunate bidder as it is rare and unique.
Thank you for your interest in this listing and may you have fun bidding.