These cards are Deutsches Reich MiNr. P308 overprinted for use in German-occupied Ostland.
This series was issued on 11 January 1942 to commemorate Stamp Day. The cards can be found on two types of stock — cream-colored (a) and chamois-buff colored (b).
The cards depict various military departments:
- /01 — Afrika Korps
- /02 — Deutsche Feldpost
- /03 — Kriegsmarine
- /04 — Organisation Todt
The commemorative postmark was used for only one day, 11 January 1942.