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Intersecting circles
Nusakan15 mm and just 3 grams
OctoCrystalEight intersecting circles, turnable by 45° which allows additional rotations if in the correct permutation.
OctoCrystal PocketThree intersecting circles, turnable by 45° which allows additional rotations if in the correct permutation.

OlimpicA custom built puzzle with an Olympic Rings theme.
Olympic GeraniumA version of Geranium with five circles in a pattern similar to the olympic rings.
Olympic Rings (circles)Five intersecting circles with a puzzle theme based on the Olympic Rings.

OlympiumFive intersecting circles rotatable in four steps.
OrionA puzzle with 25 circles and 60 pieces.
Orion (Mako)Six intersecting circles rotatable in steps of 120°

Orion-14Four intersecting circles (in steps of 90°) in a 2D-puzzle of soviet origin.
Orlov TwoTwo circles and irregular center pieces.
Orlov fourThe successor of the Orlov with four gears, even with the same middle pieces.

Orlov gearInspired by the gear puzzles from Douglas Engel. Three circles and irregular center pieces.
Outlander 2D-180A variation of the Outlander 2D-1 model which has now been made symmetrical.
Outlander 2D-2Second member of the outlander family, puzzles with intersecting circles based on a rune known from the Outlander movie.


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