Uses a very interesting slide and interlock system that will hold the barrel securely in place when assembled
There are about 5000 possible solutions
You can see a video on the puzzle at this link:
Challenging for both chess and non-chess players
Optician Wood Puzzle | Personalizable Graduation Gift for Eye Doctors stewart coffin design 222 Uses a very interesting slideChallenge yourself to arrange all the pieces within the base of this finely crafted Optician Wood Puzzle gift. Made from 1 4" thick wood, it incorporates at least four distinct wood types and measures about 7. 5 inches square, including the cover. This intricate puzzle features elements such as a Vision Chart, Ophthalmoscope, Glasses, Eye Drops, Eye Shield, Phoropter, Visual Fields Tester, Contact Case, Eyeball, and Doctor Patient figures.