These are not official German postal stamps. It is possible that they are overprinted over official stamps. I’ve seen these for sale before by others. Maybe someone knows the history.

This is a set of 2 Private Re-Printed German Zeppelin stamps featuring the denominations of 2 & 4 Reichmark.

The stamps are in mint never hinged condition, with vibrant colors of blue and brown, and are of high quality with a F/VF (Fine/Very Fine) grade.

Postal rates have risen substantially this year and will increase again soon.