The puzzle was originally made for one year only in 1986 by Binary Arts (now called Thinkfun). In that year 7500 were produced and only about 750 are estimated to still exist.It consists of a sliding carriage and a stationary base. The carriage is fitted with 8 rectangular switching bars which can pivot on their centres to angle in either of two directions. The base, which holds the carriage during the puzzle’s operation, is fitted with an assembly containing 4 blocking keys. These keys ca...
$150.00
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