Norwegian Viking Ship silver gilt guillouche enamel brooch O.F. Hjortdahl Oslo Norway

A scarce original post 1931 period very fine quality small octagonal guillouche enamel example, depicting a Norwegian Viking Ship sailing on the sea at sunset; the reverse impressed with maker's details for 'O.F. Hjortdahl Oslo Norway' '925S' and 'N' in box. Very good condition, complete with original pin fittings, no stress marks or loss of enamel, an excellent example. Size approx 21 x 13mm.