Those ads are great, thanks.
I had seen a bumper Polerouter for sale with a bracelet with UG clasp but I'm fairly sure it was a later generic bracelet (it was neither GF nor JB Champion) with a UG clasp added.
That just got me thinking about the earliest UG bracelet.
Neither. UW.
Neither. UW.
If it's the ones I'm thinking of, they also don't fit the final links very well. The cut-out is bigger than the link, so they have decent gaps.
I think it might be from a White Shadow