This is a 25 Ore green stamp from 1869, issued by Denmark. The stamp features a stylized design of the Danish coat of arms and the inscription "DANMARK" within a circle. It is canceled with a circular postmark in black ink featuring the words “ODENSE” and the year “1869.” The stamp's condition is used. This antique stamp is a fascinating artifact for collectors of Danish postal history and those interested in the development of stamp design.