60. 30 Kopek Workers, variety "double imprint", mint never hinged, flawless condition, extremely rare, signed by Dr. Rommerskirchen et alia and photo certificate Walter Zirath "... The 2nd imprint is shifted approximately 1 mm to the left. The condition is flawless, as the perforation is typical for this issue. Only a few specimens of this variety are known.", Michel 2. 500.- (undervalued)