Green’s Dictionary of Slang

1. twopence.

c.1698		B.E. Dict. Canting Crew n.p.: dace c. Two-pence, Tip me a Dace, c. Lend Two-pence, or pay so much for me.
1725		New Canting Dict. [as cit. c.1698].
1737, 1759, 1760, 1776		Bailey Universal Etym. Eng. Dict. [as cit. c.1698].
c.1750–1882		B.M. Carew Life and Adventures.
1785, 1788, 1796		Grose Classical Dict. of the Vulgar Tongue.
1809		G. Andrewes Dict. Sl. and Cant.
1811		Lex. Balatronicum.
1823		‘Jon Bee’ Dict. of the Turf, the Ring, the Chase, etc.
c.1850		Duncombe New and Improved Flash Dict.

2. (US) two cents.

1859		Matsell Vocabulum.
1882		Dly Dispatch (Richmond, VA) 1 Nov. 3/3: A ‘dace’ is two cents.
1960, 1975		Wentworth & Flexner DAS 137/1: dace n. Two cents; small change. Obs.