TIENTSIN: 1912 Experimental letter card with detachable envelope inside for reply, sent registered to Germany with „KITAI“ 1k, 2k (6) and 7k, all tied by Tientsin 30.11.12 cds (Tchilinghirian type 5C) with bilingual registered label adjacent, very rare as this experimental stationery was not issued to the public, though a few Postmasters‘ samples found their way into the post, possibly unique usage from a post office abroad Note: Illustrated „The Postrider“ 22 (1988) p.5