Description: Letter sent from Varaždinske Toplice via Varaždin to Vienna 21.07. 1879. Franked with stamp Mi.No. 37, which franking value on territory of Hungarian stops 31.07. 1871. Because of that stamp is not canceled and on arrival is charged porto in cash in amount of 10 kr., which is marked with blue pencil on envelope. Interesting and in good quality.