Set Date(s)
1 August 1929
On 1 August 1929, Bremen launched a catapult flight to Bremen. Mail carried on the flight was stamped with a serial number, with a total of 19,003 pieces carried.
Mail carried on-board originated from four sources — inland U.S. sources, U.S. seapost, German seapost, and Canada.
Most mail carried on-board bears a red Bremen flight cachet.

Also, a number of the pieces carried were marked with a red box cachet from the Berlin C 2 post office.

On 1 August 1929, Bremen launched a catapult flight to Bremen. Mail carried on the flight was stamped with a serial number, with a total of 19,003 pieces carried.
Mail carried on-board originated from four sources — inland U.S. sources, U.S. seapost, German seapost, and Canada.
Most mail carried on-board bears a red Bremen flight cachet.

Also, a number of the pieces carried were marked with a red box cachet from the Berlin C 2 post office.
