the makersmark looks like the makersmark from the Berlin goldsmith Heinrich Gotthilf Lercher (born 1803 in Weißenfels, oo 1831 as gold- and silverworker, +7.2.1873)
Ref. W.Scheffler, Berliner Golschmiede, no.2057 #424
but is is not the Hallmark of Berlin and not from Weißenfels