The single bolt clamp design your seatpost have was pre-dated by more complicated multi bolt designs, not only at 3TTT, but a lot of other component companies, so I don't think it's the earliest seatpost that 3TTT issued.
Here's a seatpost that's for auction currently at eBay that what I think is an older design that was most likely issued earlier than your seatpost.
http://www.ebay.com/itm/Rare-Vintage...item3a810ff99c

Chombi