In 1979 Pink Floyd was in L.A to do the final recordings and mixing of "The Wall"

Phil Taylor (Gilmour's Guitar tech) took some time off and went on shopping guitars around Los Angeles. He dropped by guitar trader Frank Lucido at California Guitars and scored a deal on this early Blackguard Broadcaster.

Gilmour then bought it from Phil in 1983 for his collection and had it for studio use. 

It is unknown if it features on any recordings.

It sold for $200.000 at Christies at the Gilmour Collection auction in 2019