Parts: 1970s Gibson-Branded Bigsby Tailpiece

I bought this Gibson-branded, Bigsby B5-a-like tailpiece for use on a partscaster but in that application (because of the way the guitar was built), it wasn't working out for me. I keep thinking I'll throw it on a different guitar but just haven't gotten around to it, so it's up for grabs.

The base is original and has all of its fittings except for mounting screws. The arm and spring are newer -- the spring is brand new.

These were mostly found on '70s SG models.