Help identifying neck pickup in my 1995 USRG30
I've got a head-scratcher in terms of identifying the neck pickup that came in my what I THOUGHT was stock1995 USRG30. Up until I just looked this morning, I thought the neck pickup was a stock DiMarzio PAF Pro, as every piece of literature I've ever read said was the pickup used there for this model. However, unlike the Tone Zone in the bridge which has DP155 imprinted into the pickup, my neck pickup does not have the DP151 (PAF Pro) I was expecting to see there, but rather says what LOOKS like "S 1" or maybe "5 1". I've included the picture of what it looks like here. Any chance this is something else other than a PAF Pro, or is this just more OEM games that Ibanez/DiMarzio were playing in terms of the imprinting? Thanks for any help you can provide!
Jeff in Houston