It was first sold in Japan to old Gibson collectors. There are 3 versions of the pickup to represent how bad the build quality and inconsistant the old Gibson factory was. The Burstbucker 1 is underwound and has a low output. The Burstbucker 2 is a lot like a Classic 57 and has a medium wind. The Burstbucker 1 is underwound and has a low output. The Burstbucker 2 is a lot like a Classic 57 and has a medium wind. I guess the 2nd one is the most accurate of the 3. And the Burstbucker 3 which I am reviewing is the hottest of the 3 and is pretty much a bridge only pickup. The pickup has Alnico2 magnets for a more vintage style tone.