The spoon is stamped "830S" c.1920s which was the Norwegian silver mark up to approx 1920 when 925 began replacing it.
Large American sterling silver & 14K serving spoon with flowers
AN ANTIQUE STERLING SILVER STUFFING/SERVING SPOON LONDON 1916.
George II Large Silver Hanoverian Serving Spoon. Made in London 1745.
Victorian Sterling Silver Apostle Serving Spoon 1894 London Antique Landsberg
Antiq Newcastle 1850 J.W Fiddle HM Solid Sterling Silver 925 Serving Spoon 71g G
Cased solid silver large serving spoon & fork 136.g Sheffield 1914 - 21cm long