20 Roubles G.M. Grechko

Georgy Grechko flew three Soviet space missions between 1975 and 1985, logging over 134 days in orbit and conducting the first EVA to inspect a potentially faulty Salyuz 6 docking port in 1977 — a walk that confirmed the station was safe and allowed the mission to proceed. Transnistria, unrecognized by the United Nations and operating under persistent economic sanctions, has long used its numismatic program as a de facto diplomatic tool, issuing collectibles where conventional statecraft is unavailable.