2 Gr. perforated, horizontal pair on insured letter over 24 thaler and 5 groat, with single circle postmark "Pyrmont 30 7 71" over Ritzebüttel to Cuxhaven. The cover is about 1 Gr. under-franked (missing Assekuranzgebühr), vorders. Appropriate notation "passes not", signatur of the official and appropriate postage due. Reverse five red varnish seal. Provenance collection Spalink, expertized Spalink BPP