I finally got around to picking up a Supra (abut time i know!).
It's serial # 633970 so i'm assuming 1968 by the dating guides online. If so that's pretty cool because my Dyna and Powertone's are both '68 too. Also my mom would have been pregnant with me at the time and my birthday is a saturday in 1969 and Ludwig weren't making drums on weekends by then so hey close enough for me!
Anyways she's not missing anything, including original snares (but not heads), tone control is black (or dark grey, she hasn't been opened yet) and by the weight definitely not COB.
I picked her up with a 5 piece 80's Swingstar w/ Speed King, Paiste & Zildjians, lots of stands, anvil fibre cases and spare heads for $400 cdn.