Mfg by MSSC (The Manganese Steel Safe Company)
That should provide you your search info. A wealth of information to be absorbed!
I consider your cannon ball safe post HRE (Hibbard Rodman Ely). The lock design is one of three that post HRE balls used. I’d be curious as to which comb lock number you have. The number is stamped on the face of the wheel pack.
DH