FORMS and VARIETIES
For the typographic overprints, two printing plates were prepared and were designated by Mikstein as Forms 1 and 2. The Form 2 printing plate was reset at least 4 times which generated Form 2 sub forms A, B, C, D and E. The table below lists the Forms and the stamps values overprinted with each. Forms 3 and 4 were used for the lithographic overprints.
Form
Stamp values
1
 3, 5, 6, 10, 12, 15, 20, 25, 40, 50, 60, 80, 90h, 1Kr, 50/42h PD
2A
 5, 10,20, 25, 30, and 40h Postage Due
2B
 25, 30h, 1Kr(part), 15/36h Postage Due
2C
 2, 4, 6, 10, 30h Newspaper, one sheet of 15/36h PD
2D
 15h Postage Due
2E
 6h (half sheets)
3
 80h
4
 2, 3, 4, 10Kr, 1, 5, 10Kr Postage Due
There are 3 major varieties of Form 1, 1 major variety of Form 2, and 1 major variety of Form 4. These are illustrated below.

Inverted overprints are known only on the 6h, 40h, 50h, 60h, 80h and 15h postage due values. Double overprints are known only on the 40h and 80h and 50/42h postage due values.