Puzzle Potato Antigravity metal

As the world’s most recognized scientist, Isaac Newton formulated the law of universal gravitation. However, some rumours say that Newton also worked in the field of antigravity, which he never made public due to it’s potential devastating effect on mankind. Recently a mysterious object was discoverd at an auction. According to the auctioneer this item once belonged to Newton and could potentially hide something linked to his anti-gravity research. Who knows what’s inside? BUT! It could be you, who discovers Newton’s big secret.
Playtime: 60-90 minutes
Difficulty: 3/5