Green’s Dictionary of Slang

money, cash.

1789		G. Parker Life’s Painter 136: And as the kelter runs quite flush, [...] With spunk let’s post our neddies.
1789		Both Sides of the Gutter part II 10: Dere’s ne’er a boy [...] dat does not love kelter better dan de belly-ach.
1811		Lex. Balatronicum.
1823		Egan Grose’s Classical Dict. of the Vulgar Tongue.
1833		‘The Masqueraders’ in Corinthian in Spedding & Watt (eds) Bawdy Songbooks (2011) IV 42: What, will none of you drop your loose keleter?
1842		Egan ‘The Bould Yeoman’ in Farmer Musa Pedestris (1896) 138: That’s right – tip up the kelter, it will make my bones amends, / And wherever we may meet, farmer, we’ll be the best of friends!
1848		Bartlett Dict. Americanisms 356: tin. A slang word for money. ‘Kelter,’ ‘dimes,’ ‘dough,’ ‘rocks,’ and many other words are used in the same manner.
1865		Leaves from Diary of Celebrated Burglar 107/1: We’ve bin a ’ogs-’ead o ‘kelter’ ouwt in t’ waiy ov expenses.
1871–82		B.M. Carew Life and Adventures.
1910		P.W. Joyce Eng. As We Speak It In Ireland.
1997		Share Slanguage.