Arancia MeccanicaA moving bead puzzle with seven colors of beads, and a base that resembles an orange.
Briansk ringsAnother derivative of the hungarian rings produced in the USSR.
Fisher CubeTaking the concept of the Rubik's cube and turning it 45 degrees.
KristallThe Tetraminx produced in Riga during the soviet era.
Kristals-MA tetraminx with russian origin with a special spiky shape.
Kvadratura KrugaA puzzle from the soviet era. Its title means "Squaring the circle"
Okki Gem I (aka Alexanders Gem)A sticker variant of the Okki which transforms the puzzle back into a puzzle equivalent to the 2x2x2. Produced in East Germany but often customly remade.