1 Kopeck 15 orbits

The "15 orbits" designation refers to the wreath on the reverse, which carries 15 ribbon-bound turns of grain — one for each Soviet republic. This detail shifted across the series as the official count of republics changed; the 1957 issue reflects the post-1956 composition following adjustments made after earlier Soviet reorganizations. A small change with outsized cataloging consequences, as it splits the kopeck series into distinct subtypes that casual collectors routinely conflate.