BHM 3139.
45mm. By L.C Wyon. Struck by The Royal Mint.
Obverse with diademed bust of Victoria, reverse engraved within wreath 'Awarded to William Stobbs for anthracite - Beebe Range'.
Only Very Fine but very rare with the Mint report for 1882 recording that 79 medals were struck, without specifying the breakdown for different metals.