1 / 4 Gr. small breast shield, gray violet being a correctly franked single franking on local letter with single circle "WIESBADEN 3 3 73", faultless condition, + Gr. postage step = reduced fee for local covers in the formerly Thurn and Taxis postal area in the Duchy Nassau, photo expertize Krug BPP (2014) : " . . . In perfect condition. Scarce single franking. ", Michel 800.