Those were on Ebay right? If I'm not mistaken, the same seller also had another 20 and a 12 that matched these which would make it Rock Duo. But I'm not sure if that was a cataloged set in '68.

Would have to see interiors to determine.

Aha! You are spot on. Pretty sure it's the Rock Duo.

First catalogued in '67 it seems?

http://www.vintagedrumguide.com/ludwig_set_rock_duo.html

Please excuse the newbie comment (I'm a 15 year player of Pearl kits) but were Rock Duo's just a configuration name or are the shells/drums actually different to the Classics?

No photo's of interiors. Will try and source some.

well, if it's as t.c. has said, it very well could be from a Rock Duo configuration. The shells were all the same back then. Only the configurations were named.

That's a damn shame if someone split up a perfectly good rock duo set. Those don't come around too often in original shape either. I have a 1968 psych red rock duo set. It first appeared in the '67 catalog so it has prob been around since 1966 or possibly 1965.

find those other drums! contact the seller, you will be kicking yourself for the next twenty years if you dont get them!!

not to mention, those other drums are now orpans!:(