Very rare, technological sample of the State Mint.
Mint art. Natural yellow in a light patina.
One of two proofs complementing the 1949-57 brass proofs. Differing in design, as the denominations introduced in 1958 (2 and 5 gold) were not marked with a concave SAMPLE inscription, and it was placed on the stamp (as a result, it is convex on the coin).
Mintage of 100 pieces.
Brass, diameter 27 mm, weight 8.87 g.
