Half Hour Variant (STC 29-B)designed by Stewart Coffincrafted by Eric Fuller (2023)condition: as newdescription: a refined variation of Coffin’s classic interlocking design where the pieces pack into a box with an obstructed opening. This update fully changes the internal constraints and solution path of the puzzle.product page: https://cubicdissection.com/products/half-hour-2023-packing-puzzleThe item will be shipped from Budapest, Hungary. Shipping costs will be calculated after bidding has ...