The currency of the Soviet era in 1928 was 0.5 kobi
1 ruble of Soviet currency during the 1920 period
1 ruble of Soviet currency during the 1922 period
1941 Soviet Currency 3 Gobi
10 kobies of Soviet currency during the 1925 period
15 kobies of Soviet currency during the 1929 period
15 kobies of Soviet currency during the 1921 period
1924 Soviet Currency 1 Gobi