German regional gazetteers and Wikipedia articles for Prussian-era and present-day localities · Meyers Gazetteer; GOV/genealogy.net; AGOFF; Wikipedia (de/en)
Finckenstein, Rosenberg, Marienwerder, Westpreussen, Preussen
Meyers Gazetteer entry 'Finckenstein' (Type Rg., AG Rosenberg Westpr., StdA Finckenstein, ev. Pfk. 1, population 1543); neither of the two exactly-spelled Finkensteins in the 1912 empire is in West Prussia. de.wikipedia 'Kreis Rosenberg in Westpreussen' maps Finckenstein to Kamieniec (Susz); pl.wikipedia 'Kamieniec (wojewodztwo warminsko-mazurskie)' reads 'Kamieniec (niem. Finckenstein)' and gives 53.764167, 19.371667.