Almost 100% the mark of Karl Kurz (Hanau).He used modified fleur-de-lis mark in combination with other marks.
See here under Karl Kurz;almost the same fleur-de-lis marks.
Necklace - Halskette ("Kropfkette") most probably made by Lorenz Wieninger, active: 1798-1828.At least what I can tell; the only silversmith with LW initials in Vienna at the time.
this is the same mark
oel wrote:JEÅ for; Johan Erik Åhlen, I believe active in Sala 1827-1862. If correct it should be N4 for 1843