Customs Seal, British, Customs and Excise, Sheerness

Customs Seal, British, Customs and Excise, Sheerness, Image & Found by Kevin Dyer Customs Seal, British, Customs and Excise, Sheerness, Image & Found by Kevin Mud Mammal Dyer.
Found Thames foreshore, 17mm.

Crown, (H.M.)CUSTOMS curved down (&) EXCISE curved up around // SHEERNE(SS) / 38

Appears to be a customs & excise seal for Sheerness, Kent.

The Tudor crown indicates it is from a date before 1953 - Wikipedia.

Photo info