22mm. By Spink & Son.
Obverse with Britannia standing left, resting foot on prow, holding spear and being crowned by Victory. Reverse with inscription within wreath. Edge with raised lettering which reads 'CENTENARY OF THE BATTLE OF TRAFALGAR 1905'.
Encased in glass lunettes. Some mistiness otherwise Extremely Fine and scarce.
This is a miniature version of the gold naval medal posthumously awarded to Nelson for the Battle of Trafalgar.