I picked up this Ludwig Supra last week on CL for $40. (Just to brag about the find.)
I put new heads, snares and replaced a broken throw off lever. I got the replacement lever from my local music shop's old parts bin. I believe it is from a P83 as it is a little shorter than what comes with the P85. The rest of the strainer (which came with the drum) is a P85.
The drum did not have a badge and there were no dates stamped inside the shell. (There is a silver Ludwig round sticker.) Although there was no badge, there was a a grommet that was silver/aluminum in color. There was a trace of the badge that appeared to be bronze in color (which had me thinking keystone badge).
As you can see from one of the pictures the muffler has a round knob, not the ball bat lever if that helps with the dating.
Any thoughts has to if this drum his 60s, 70s, 80s?