Green’s Dictionary of Slang

(N.Z.) the female breasts.

1779		Nocturnal Revels I 61: Poll Nimblewrist without her stays, and her duds hanging below her apron strong.
1968		G. Slatter Pagan Game (1969) 165: He kept trying to pat her rump and telling her he hadn’t seen such lovely duds outside a garage calendar.
1974		(con. 1930s) I. Agnew Loner 21: ‘Duds on her like this.’ And he made a slow, curving motion with his hands.
2003		McGill Reed Dict. of N.Z. Sl.