Green’s Dictionary of Slang

dimes, the n.

(US) money.

1845		Nat. Police Gaz. (NY) 8 Nov. 92/2: Four ‘gentlemen’ have lately arrived here from Philadelphia, wel stocked with ‘the dimes,’ as they call it.
1848		‘Ned Buntline’ Mysteries and Miseries of N.Y. III 33: You’ll lend Charley the dimes to make all his stealings up?