Green’s Dictionary of Slang

owt n.

two.

1861		(con. 1840s–50s) H. Mayhew London Labour and London Poor I 411/2: There’s people there talk backward – for one they say eno, for two owt.
1885		Edinburgh Eve. News 26 Dec. 3/5: ‘Eno’ is one; ‘owt,’ two; ‘eerth,’ three; ‘rouaf,’ four; ‘exif,’ five; and ‘xis’ pronounced exes, six.
1904		Sun (NY) 10 July 29/4: Here is a genuine letter written in thieves’ slang, recently found by the English police [...] I met owt old men of the world tray lightmans ago.
1935		R.T. Hopkins Life and Death at the Old Bailey 66: ‘Owt-gen, teaich-yenep’ two and eightpence.
1953		J. Franklyn Cockney 297: Owt (two).