Radio PlaneFive intersecting circles in a pentagonal pattern
RadiowavesFive circles (three concentric) of different sizes, all of which rotate by 180°.
Rainium RainbowSeven (not six) intersecting circles turning in steps of 90�.
Ramka A puzzle from the soviet union with intersecting plungers made in the eighties.
Ranking StarsTwo sets of three intersecting plungers. It comes with two blocks to bandage the puzzle additionally.
Rashkey 1First of a series of three similar puzzles. The three differ only by the colours of the pieces.
Rashkey 2Second of a series of three similar puzzles. The three differ only by the colours of the pieces.
Rashkey 3Third of a series of three similar puzzles. The three differ only by the colours of the pieces.
ReciprocatorTwo sets of parallel plungers are also connected by an inner pinion. Pressing one plunger causes the adjacent plunger to move in the opposite direction.
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