you can do that today in any American PO. In fact, many combo FDCs do precisely that, adding new stamps to existing PM'd covers. and, you are right, Bruce, the PO wins in all cases, especially where the sole service provided was the downward movement of an arm with a cancelling device
I invite opinions on this cover.
My thought is that Germans were allowed to bring their covers in to a post office for a special cancel. If the cover wasn't mailed on that day, the potential sender could address the cover at a later date, affix the correct postage and mail the cover with, in this case, the special cancel on the Hitler birthday stamp at upper right and additional franking to properly mail the cover at lower left. Note that the special cancel is from Berlin and the other stamp is from Stuttgart which correlates to the return address on the backside.
I don't see how the post office loses on this service. In fact, now I'm wondering if any post office would allow the same scenario?
Bruce
re: Third Reich Cover Postmarked Twice
you can do that today in any American PO. In fact, many combo FDCs do precisely that, adding new stamps to existing PM'd covers. and, you are right, Bruce, the PO wins in all cases, especially where the sole service provided was the downward movement of an arm with a cancelling device