For the bright members of this forum the title should be self evident. But exactly what is a 513? This curiosity stream started with this guitar selling on the auction with the Kinks Firebird. So it is academic at this point since the sale is over but I'm curious. It isn't in the current catalog. There is a 509, which is similar. They are both H-S-H configuration. This, I would think, would make it versatile. Was the 513 replaced by the 509? What is the difference between the two pickup systems? The 509 has coil tapping toggle switches. 3 single coils?! I can't see toggle switches on the photo. Push-pull? I'm still looking at the Special Semi-Hollow and viewing this as an alternative. But the Semi-Hollow has the advantage of being a lot lighter.