Euphonycart Present Gibson IM57B ZB Guitar Pickup. It would be a big mistake to assume that all humbuckers sound alike. Truth is, there are a number of Gibson humbucking pickups available, and each one has its own distinctive personality. The BurstBucker Series delivers all the vintage vibe of the legendary “patent applied for” (PAF) humbuckers, best known from the 1959 Les Paul Standard. All three BurstBuckers have unpolished magnets and non-potted coils. There was tremendous variation among those early hand-wound humbucking pickups. Employees would wind the bobbins “until they were full.” This was typically about 5,000 turns. The BurstBucker 2 is wound in the range of the original 1957 Classic, with slightly hotter output than the BurstBucker 1. It works well in the bridge position, matched with a BurstBucker 1 in the neck position. This one has black / cream “zebra” bobbins and no cover.