I am doing a restore/clean up of a date stamped June 4th 1962 Jazzfest in WMP for someone, and the drum looks to be factory up and down. Original hoops, tension rods, washers, butt plate, lugs, and red felt BB muffler all in perfect original condition. The weird thing is, instead of a P-83 the drum has the large Pioneer strainer on it from the same era. The face plate is the same as would have come on the p-83 (not the old inverted p-85), but the actual mechanism is the large Pioneer style (with the stubby little lever arm) also offered at the time.

No extra holes, and everything else appears that no one ever modded the drum (other than to place some nice neon green spray paint on a couple of panels and the top counterhoop). My question is this: did someone replace it (seems very unlikely to me based on the condition of the drum...no tampering evidence), or was Ludwig out of p-83 strainers that day so they threw this one on and called it good?

Ill post a pic in a bit if no one knows what I mean.

Thanks dudes!

-Adam