Prussian, Customs Seal of Frederick The Great

Prussian, Customs Seal of Frederick The Great, Image by StuE, Found by Colin Gilbert.
Found on the Essex - Suffolk boarder.

Monogram FR (Fridericus Rex = King Frederic) // Prussian eagle holding sword and sceptre,(from other seals) REGIE DES DROITS DU ROI around

A customs seal of Frederick II, The Great of Prussia. (1740-1786).