what's up with the pup ring s?
Yeah, I have no clue what the deal is with those rings, but it cleared something up for me. I had a 73 black Custom that was a factory 2nd. It had these witness lines from what seemed to have been oversized pickup rings with rounded corners. Thought it was weird as hell. I still don't get it, but I at least know that it probably had similar rings on it at one point.
The rings are commonly known as "goof hiders" and legend says they were put on guitars to hide bad routing. That's not the case here as the routs fit mini's and P90's perfectly.
I think they were used just to make the pickups look bigger,like full size humbuckers ,which were not used in Deluxe's at the time.