Invalid usages of the stamps
The stamps were postally valid from 1/nov/33 to 30/sep/34. The usages after that date had to be taxed at 1,5 times the unpaid amount. Many times that didn't happen.
Inland letter sent from Gossmannsdorf 25/feb/35 to Würzburg.
The 8 pf stamp was not good for postage at the date, but was accepted by the post office.
Rate: 12 pf for an inland letter up to 20g
503A MiF
Inland letter sent from Reutlingen 26/nov/34 to Tübingen.
The 12 pf stamp was not good for postage at the date, so it was correctly marked with a red crayon and taxed 1,5 times: 12 pf x 1,5 = 18 pf.
Rate: 12 pf for an inland letter up to 20g
504A EF