POLICE UNITS - UPPER SILESIAN SPECIAL POLICE, 60 Pfg dark red-carmine official July 1920, single franking on letter to Sanow, double-circle KATTOWITZ 22 8 21 ..., more precise identification impossible, violet Z4 unit mark Police de Haute-Silesie Etat-Major de Groupe de Kattowitz (Katowice) Dept ___ J.-Nr. ___ (OS handbook 4.8.a.) and violet double-circle Police de Haute-Silesie Etat-Major Groupe de Kattowitz (Katowice) (unlisted in OS handbook), age and use wear typical of period