I have two sets of these silver candleholders, one set with a slightly larger base. The design is identical but the hallmarks on each are not the same at all. I can't find any marks like these.
Wuerzburg Germany, Georg Stephan Doerffer 1771 - 1824, worked for Fürstbischof Georg Karl von Fechenbach. Examples listed "Wolfgang Scheffler, Goldschmiede an Main und Neckar" S. 102 ff