If you need real security, replace the VAM 122 lock with a (e.g., Medeco, Abloy) or a small format interchangeable core (SFIC) . Alternatively, install a hasp and a standard padlock.
Often sells in the range of $180–$200 . vam 122 key
Offered for your consideration is a striking example of the 1878 Morgan Silver Dollar, specifically cataloged as the VAM-122 variety . This particular piece is a "must-have" for variety specialists, featuring the characteristic doubling on the digits of the date, most notably the '18'. If you need real security, replace the VAM