Latvian, Kontrole Seal, Image & Found by Kevin Mud Mammal Dyer alias Medway Mammalian Mudlark.
Found on Thames Foreshore, 13mm.
A shield bearing Per fess and in base per pale: a demi-sun issuing from base; 2nd a lion rampant; 3rd a gryphon segreant brandishing in the dexter claw, arc of three mullets crest above, LATVIJA below* // ZM / ...U / KONTROLE
From the finder, "Latvian bag seal . One side has the crest of Latvia the other has 'kontrole' ( control ) which suggests this is a seed control seal similar to the Danish ones I've had from the same spot ?"
*Coat of arms of Republic of Latvia was officially adopted by the Constitutional Assembly of Latvia on July 15, 1921 and was in official use from August 19, 1921. It was created using new national symbols and older heraldic elements from Polish Livonia and Duchy of Courland and Semigallia. Thus the coat of arms combines symbols of Latvian national statehood, as well as symbols of its ancient historical districts.
From Michel Royer, "Z.M. : Zemkopības ministrija - The Ministry of Agriculture."
From Paul Cannon, "I would suggest that the unclear word in the centre of the seal is SĒKLU ie ‘Seed’, based on the following much better preserved example here - m o j e W Y K O P K I"