12 Piece Slot Puzzle - Burr Puzzle, Dirty Dozen Metal Puzzle, Level 9
did:plc:xujdr3kkymg5kkm7hdlmdszy
April 10, 2026
See https://www.reddit.com/r/ScienceNcoolThings/s/zVc9IUdbwq for how to solve/assemble the puzzle
Discussion in the ATmosphere