Gibson Les Paul Pickguard. From a standard or custom. Late 60s probably but fits a 70s guitar too as far as I know.

No bracket, but I got a repro bracket if you need one. The golden one on the picture.

The remaining stains are left of price stickers from a guitar show where it came from. I made a gentle attempt to get rid of it but I save the last stubborn material for the next owner, who probably is more clever and successful than me.