Re: So the old story of buying a safe locked open
The lock is a Mosler. Maybe it is a GSA container in which case it only can be a manipulation protected lock. It is probably a very solid steel cabinet and it will probably be a PITA to get it open for reuse. It is also not as beautiful as yours.
In case you wonder ... Martin Hewitt is a fictional detective in stories by Arthur Morrison:
Martin Hewitt, Investigator Chronicles of Martin Hewitt
Martin Hewitt, Investigator Chronicles of Martin Hewitt