The Collaborative International Dictionary of English v.0.48:

Daker \Da"ker\, Dakir \Da"kir\, n. [See Dicker.] (O. Eng. &
   Scots Law)
   A measure of certain commodities by number, usually ten or
   twelve, but sometimes twenty; as, a daker of hides consisted
   of ten skins; a daker of gloves of ten pairs. --Burrill.
   [1913 Webster]