Gold and tortoiseshell seal in the shape of a cannon, 19th century

Barrel-shaped seal in 18 carat gold and tortoiseshell with gold stitching, the barrel used as a seal whose mouth is set with a two-coloured agate bearing the monogram T.
Chased gold mounting and wheel.
19th century work.
Horse's head on the barrel ball from 1838.
Two owls on the chariot (control).
Specimen in tortoise shell, conforms to CE rules. Pre-1947 specimen. Certificate cites necessary for sotie UE.