Yes and no. The first year that I see any recordings for the Tandem is 1949...... 01/19 ------------------ T001000 ----- T001217 -(TDM)
The Tandem's SN always started with the T00 during the years the T&C was available and the number was stamped on the rear bottom bracket. I believe after the T&C was discontinued the numbers went to the standard SN recordings and were then stamped on the left rear dropout, and this was sometime in the early 60's. The last entry for the Tandems that I can see was 07/24/1950 ------------------ T002663 ----- T003035 -(TDM)