Sterling silver 38.6mm diameter, 28.6gm.  By Pobjoy Mint.  PROOF 4 standard.

ISLE OF MAN  ELIZABETH II. Her diademed, draped bust right.  R. 1952 · SILVER JUBILEE · 1977 · ONE CROWN ·  Three crowns around central triskelis. KM 41a. Almost FDC.  In case of issue, with certificate.

Depictions of coins are unretouched images of the actual item offered for sale.