cover 1911 (24 Dec.) local envelope bearing ½a. tied by a fine strike of the "BASE·OFFICE/C/24 DEC 11" double-ring c.d.s. and showing, on reverse, "DOOM DOOMA" and "SAIKWACHAT" single-ring d.s. (both 25 Dec.); also 1912 (17 Apr.) piece bearing 3p. strip of six cancelled by four strikes of the "BASE·OFFICE/C" double-ring d.s. without killer bars applied at Doom-Dooma

Details
cover 1911 (24 Dec.) local envelope bearing ½a. tied by a fine strike of the "BASE·OFFICE/C/24 DEC 11" double-ring c.d.s. and showing, on reverse, "DOOM DOOMA" and "SAIKWACHAT" single-ring d.s. (both 25 Dec.); also 1912 (17 Apr.) piece bearing 3p. strip of six cancelled by four strikes of the "BASE·OFFICE/C" double-ring d.s. without killer bars applied at Doom-Dooma