Rui Namora plays Sokolov Polka on a 19th century Russian 7-string Guitar

This Polka is attributed to Ivan Trepanovich Sokolov, a gipsy musician who became a choir leader in early 19th century in Moscow. Is is not clear that Ivan Sokolov really is the author of this Polka, but the name remained until today, as a folk piece, popularized by this arrangement by Sergey Orekhov (1935-1998) Rui Namora, Russian 7-string guitar (Zimmerman, late 19th century)