2 Groschen small breast shield, blue, unused with original gum, expertized Starauschek, photo expertize Sommer BPP "genuine, especially intensive dark ultramarine shade. Excellent embossed, in the best way centered and perforated, excellent condition. Unused 2 Groschen stamps are rare", Michel 2.200.- provenance: collection Nitaha (175. Dr. Reinhard Fischer auction)