cover 1920 (20 April) cover registered to Tiflis (24.4 arrival backstamp) bearing 1r. and 3r.50 vertical pair, all three adhesives overprinted with different styles of the Tchilinghirian and Ashford Type E12 monogramed handstamp, tied by "ERIWAN" c.d.s. and with companion registration label adjacent. Very rare. Mikulski Certificate (1994). Photo