DCHP-1 Online
MBeaver Hist. 
a unit of exchange equilent to the value of one prime beaver pelt, used in buying furs and bartering provisions, more usually referred to be trappers as a skin (def. 1).
See also: made beaver skin (def. 1)
- 1784 (1954) Many of my Indians have been in since my last, some have done well others indifferent & some very bad indeed only paying 15 out of 65 M Beaver their Debts.
- 1794 (1954) . . . all the Furrs I saw would not amount to 1000 M Beaver . . . but as the large Canoes are returned to Montreal some time since much must have gone down by them. . . .
- 1784 (1954) Many of my Indians have been in since my last, some have done well others indifferent & some very bad indeed only paying 15 out of 65 M Beaver their Debts.