Brain Test Level 272 (NEW) We must open this vault

Daze Puzzle provides a complete walkthrough for "Brain Test Level 272: We must open this vault.".

By Daze Puzzle /
Question
We must open this vault.
Hints
Hint 1:
There must be a clue on a paper somewhere.
Step 1
Answer
Move the books away to see the piece of paper under them. If you look at it carefully you can see the password. You have to activate numbers 12358.