Tonight I removed the humbucker pickup from my first guitar - a 1983 Kramer Special. To my surprise it turned out to be a Dimarzio. I thought the pickup was a stock Schaller all these years. Suppose the "double cream" should have clued me in. Just never thought much about it. Anyway, how do I identify this pickup? Has no serial number, just "DIMARZIO PICKUPS MADE IN THE USA" on the backplate. I have an email to sales@Dimarzio, but thought I would throw it out there and wondered if anyone had any thoughts as to what it could be.