cover 1920 (10 June) "red band" envelope (opened-out) from Kulun (Urga) to Kalgan bearing "Junk" 3c. + 6c. cancelled by two strikes of the rare "TUNG-YING-TZU" Brance Office c.d.s. also cancelled by bilingual Main Office c.d.s. (Type E), some slight staining. Photo