Du Cange mentions this as being a small coin, the name of which is found in an agreement dated 1320 between Philip V of France and the Bishop of Tournay. An ordinance of 1330 mentions " deux soulz uz deniers et une abanque Parisis, " which is probably the same coin.
See Also: Abenge
Source: Frey's Dictionary (American Journal of Numismatics, Vol. 50, 1916)