Green’s Dictionary of Slang

a picture.

1925		cited in DSUE (1984).
1935		E.F. Benson Mapp and Lucia (1984) 63: He’s sketching the Land-gate now – a sweet picky.
1963–74		B. Humphries Barry McKenzie [comic strip] in Complete Barry McKenzie (1988) 78: I can make it worth your while if you end a couple of the lads to seize a few little pickies.
1988		McGill Dict. of Kiwi Sl. 84/1: pikkie a picture, photographic or cinematic.
1993		K. Lette Foetal Attraction (1994) 215: Of course, we’ll need a piccie. But the story will be told in your words.
2003		McGill Reed Dict. of N.Z. Sl. [as cit. 1988].