The Brain, designed by Marvin Allison, Jr., made by Mag-Nif
Classic sequential movement puzzle with original packaging, dated 1973 on the back. 170 moves to return all wedges to the IN position. Puzzle is in good condition and the sliders are fairly smooth. The solution is based on the "gray binary system."
I've seen a few from 1979; I believe this packaging from 1973 is close to when it was first released by Mag-Nif.
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Buyer is responsible for shipping. Please contact me if you need an estimate for international shipping. If you wish to estimate shipping costs yourself, most of my listed puzzles should weigh less than 16 ounces (450 grams). Typically, first-class international is under $22 for up to 8 ounces, and $28-34 for up to 16 ounces. I will combine multiple items for more cost-effective shipping. Please check out my other listings: https://market.cubicdissection.com/other-items/fluorescein/101207
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I try to grade condition conservatively. If the puzzle shows any sign of wear from use, it'll be a B or lower. If the puzzle looks like it did when I received it new (barring any defects), it will be graded A. All puzzles are kept in a smoke-free home maintained at 45-55% humidity.