It is indeed a jeton, specifically a Nuremberg jeton, issued by Georg Hoeger, token-master from 1764 to 1788; he is named on the reverse: GEORG HOEGER RECH PFEN. "Rech Pfen" refers to the German name for these jetons, "rechenpfennig". As George II of Great Britain died in 1760, this jeton is presumably some sort of memorial-piece.
Don't say "infinitely" when you mean "very"; otherwise, you'll have no word left when you want to talk about something really infinite. - C. S. Lewis