1825  (1950)  [. . . the weather is now becoming very warm. Still the Beaver are in their Prime.]
1859  (1870)  The fur of our fox was "prime,"--as the phrase is here,--that is to say, he was in his complete winter coat, which had not been worn long enough to become torn or rusty.
1913  . . . in the fur book the names of each kind of skin and whether large or small, prime or common, were written alphabetically.
1965  A wolverine, prime-furred, is as sleek and glossy as a marten.