Russian vintage (Chelyabinsk city made) plastic chess pieces set - New Soviet chessmen black white

Russian chess pieces set plastic.
Storage stock. Unused.
Chessmen are hollow inside the base, lightweight.

ERGO, Chelyabinsk city, RSFSR.

King is 75 mm.
Pawn is 40 mm.
Base of the chess figure (diameter) is 30 mm.
Weight (with paper box) is 250 g.

Damages: the black Queen's finial was broken and lost during transportation. I did more or less similar one of ball-bead and push pin. See all the photos.