chop mark (in image) l.r.: C STUART TOMPKINS / CAMBERWELL inscribed (vertically) in pencil on reverse c.: 11 inscribed in pencil on accompanying envelope u.c.: Sir Dallas Brooks / + Family inscribed in blue ballpoint pen on accompanying envelope l.l.: 6PP Grp 2 Glossy / 3/10 x 8 cm Mall (8 cm M underlined)