So I scored these drums at a pawn shop last week. Pretty good buy I think in spite of some wrap issues on the FT and bearing edge issues on the BD (not surprising considering that it's been exposed for who knows how long. The Floor tom and 12" have 1965 date stamps, and the serial and interior on the bass drum are consistent with that. The 13" on the other hand has chocolate milk interiors and a 67-ish serial number.
The bass drum is drilled for a rail consolette and later had a set-omatic double mount added, so I think that it's a very safe assumption that this originally sold as a 12/16/20 and the 13 was added later. Given that fact and that I'm a 4 piece guy to begin with, I'm planning to sell the 13" to recoup some of my (admittedly modest) sales cost, and then gig the 12/16/20. The 13 is also by far the best condition of the three drums, and I'm soliciting opinions on how much to ask/expect on a sale of that drum (again the 9x13 tom - circa 67/8)
pictures coming in a second (Just remembered that vdf prefers pictures hosted here instead of img code links).