MALAYA – PERAK 1933 3 x 50c Survey Department essays similar to 1935-37 issue

1933-34 three 50c Survey Department essays designs similar to 1935-37 issue Norris type G (lined background) matching horizontal pairs in black reddish lake and dull green (each the upper half of a block) on thin surfaced wove. Attractive and scarce. Purchased from Stanley Gibbons (still on their card)