WWII Occupation - Luxembourg Hindenburg Overprints MiNr. P1 MiNr. P2 MiNr. P3 These cards are Deutsches Reich MiNr. P225 I, P226 I, and P227 I overprinted for use in German-occupied Luxembourg. Set Date(s) 1 October 1940 Hindenburg Overprints MiNr. P1 MiNr. P2 MiNr. P3 These cards are Deutsches Reich MiNr. P225 I, P226 I, and P227 I overprinted for use in German-occupied Luxembourg. Set Date(s) 1 October 1940