I've got what I believe is a '68 Supra, based on the 661323 serial number on the keystone badge.
Initially I believed that the drum should have come with a P-83 strainer but, after doing a little homework using Rob Cook's "The Ludwig Book", I learned that the company switched to the P-85 that particular year. This is the strainer on my drum. It also has the 1 inch knob on the tone control, which I learned replaced the 3/4 inch knob of the prior years.
What I've noticed, but haven't seen addressed anywhere, are a few holes in the shell of my drum -- one directly above the snare butt (see pic) and one on each side of the lower portion of the P-85 (see pic). Are these factory-drilled? If so, what purpose did they serve?
Any and all words of wisdom would be greatly appreciated!