Hi, I wish it was that simple. The maker's mark appears to be
JFS above crossed hammers for: Johannes Ferdinandus Smets, registered in Amsterdam. His mark seen in rectangle, square and lozenge, also seen
.JFS. in rectangle with cut corners, also registered
I.F.S. Amsterdam silver guild 1806-1811, active Amsterdam 1806-1846.
![Image](https://imagizer.imageshack.com/v2/640x480q90/923/v7nkZC.jpg)
Maker's mark
W.K 122 for Willem Jansz. Kooiman, registered in Schoonhoven 1856, died 1886. Willem took over the silver shop of his mother (widow of Jacob A. G. Kooiman (registered 1812- died 1853), after Willem Jan's death his wife continued the shop until she died in 1889. Maker's mark used
K.122,
K122,
WK!,
WK above arrow,
WK 122 in rectangle with cut corners. After he died his widow used the maker's mark
WK-S for widow Willem Jansz Kooiman-Schepp..
Peter
Sources; Netherland' responsibility marks from 1797 WaarborgHolland, Gouda
Zilversmeden van de Stad Schoonhoven by S. A. C Begeer, E. Hak & L. Linhart-du Cloux #153