Russia 1865 Germany Charlottenburg to Vilnius Lithuania Stampless Folded Letter

Stampless folded letter, with contents, postmarked with neatly-struck boxed “Charlottenburg” datestamp (24.4.65), to Vilnius, now Lithuania, with “3” in blue manuscript denoting the 3 silbergroschen Prussian share, “20” (kopecks) in ink on reverse to be collected from the recipient, a fresh entire to a scarce destination.