An additional issue 1988 in the technique of proof (mirror surface, Mat relief) for collectors. In circulation were not issued, were sealed plastic sealed together with coins "60 years of Soviet power" 60 years of the USSR (date, 1967, 1982).
On the edge, the date "1988".
The coin has options of a jubilee ruble 1988: 2.3 mm thick, 0.2 mm more than the "Stradella". Respectively different and a weight of 12.8 g instead of 11.25.
With a circulation of 55,000 pieces.
Degree of rarity: 2-3.
Added by: Admin, author photo: baik