3 Silbergroschen light yellow, postal stationery envelope, without die number in oval embossed arms, with flap handstamp K2a, format 147:83 mm, with added 1 Silbergroschen carmine-red (MiNr. 6), stamp with wide margins on three sides, just full at left, stamp in perfect condition, cancelled with four-ring "423" and two-line boxed "FRANKENSTEIN 31 7 * 12-1", postally used from Frankenstein in Silesia to Berlin, stationery envelope flap fully preserved, neatly opened, small flap tear reinforced with hinge, otherwise perfect condition