4 Key Coin Box Puzzle

**Update:**
If you like this puzzle but want something a litte more complicated then please check out the puzzle at the following link for a small fee:
https://cults3d.com/en/3d-model/game/sequential-4-lock-surprise-puzzle-box


**Description**
This puzzle was inspired by a Mini Lock Box Puzzle by CrazyBlackStone
[https://www.thingiverse.com/thing:4606970]

At first I wanted to incorporate a box to put in a surprise for my grandchildren when they opened it so I designed the 4 Key Surprise Box Puzzle.
[https://www.thingiverse.com/thing:4722883]

The top part had a neat void between the locks and I made sure that it was big enough to hold a small coin (such as a UK £1) so it seemed sensible to redesign the surprise box puzzle into this so that the box can be omitted.