Green’s Dictionary of Slang

crinklepouch n.

[it makes barely any impact on the shape of one’s purse]

a sixpence.

[UK]‘Philip Foulface’ Bacchus’ Bountie in Harleian Misc. II (1809) 306: With the expence of an odde crinclepouch, wash yourselves within and without, and make yourselves as mery as dawes .