BHK Seal, Image & Found by Lee Greagsbey.
Found in Woking, Surrey area, diameter unknown.
BHK straight across the middle with inscription around which cannot be seen clearly enough to read. Other side looks to have had much writing on it including a word in large letters across the centre ?HE(L?)?.
From Michel Royer - Kingdom of Yugoslavia'The Kingdom of Yugoslavia (Serbo-Croatian: Kraljevina Jugoslavija / Краљевина Југославија; Slovene: Kraljevina Jugoslavija) was a state in Southeast and Central Europe that existed from 1918 until 1941, during the interwar period and beginning of World War II. From 1918 to 1929, it was officially called the Kingdom of Serbs, Croats and Slovenes (Serbo-Croatian: Kraljevina Srba, Hrvata i Slovenaca / Краљевина Срба, Хрвата и Словенаца; Slovene: Kraljevina Srbov, Hrvatov in Slovencev), but the term "Yugoslavia" (literally "Land of Southern Slavs") was its colloquial name due to its origins. The official name of the state was changed to "Kingdom of Yugoslavia" by King Alexander I on 3 October 1929.'