Green’s Dictionary of Slang

correctly, properly.

1865		‘Mr Carlisle’ Stray Leaves 182: l determined to build it ‘[i.e. a house] puckha,’ that is to say, on columns nf masonry. with a flat roof of the same.
1876		Times of India 31 May 2/2: There is only one pucka built bungalow now on the hill ; formerly there were more.
1929		(con. 1916) F. Manning Her Privates We (1986) 23: What’s a man like who’s only temp’ry, an’ wants ’is job pukka?