BULGARIA. Duo of 1000 & 10 Leva (2 Pieces), 1987-96. Sofia Mint. Both NGC PROOF-68 Ultra Cameo Certified. 1) 10 Leva, 1987. KM-184. Mintage: 15,000. Commemorating the Olympics, featuring a hokey player.<p>2) 1000 Leva, 1996. KM-221. Mintage: 22,602. Commemorating the Olympics, featuring a speed skater.