1977, 25th ANNIVERSARY, 1952-1977 COMMEMORATIVE, "DEPARTMENT of the ENVIRONMENT"...."STONEHENGE" reverse......QUEEN's 25th JUBILEE obverse.....NICKEL SILVER.....ORIGINAL HINGED LID BOX with CERTIFICATE of AUTHENTICITY....

These show up on eBay once in a while, I have seen them sell with an asking price around $20 and others sell at auction between $5 and $10.