10 Rp Strubel gray ultramarine, 1. Bern printing, so-called silk paper, black lozenge, on all sides white margined from the left upper corner right with neighbor stamp, photo expertize Urs Hermann SBPV: "faultless condition", signed Moser, SH-no. 23 B1 mm. II. B, Michel 900,- (former starting price 200)