Coin bank - ATM style with key

No screws needed but there are holes to close the locking unit if you need.

Frame and lid are the main components. 

I printed the lid with supports everything else was printed as they are.

Some pats may need turning or rotating.
Spring unit would be better to print with petg, I used pla and it works good so far.

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Still kind of work in process due the locking mechanism.