By 1910, Hamilton could rightly declare itself the "safe capitol of the world."  Its two safe manufacturers, Mosler and Herring-Hall-Marvin produced more than 80% of the safes used throughout the world. A third safe company, Macneale and Urban, began operating in Hamilton in 1889 but had ceased operations by that time.
 

Safe Polishing, Mosler Safe Company	Mosler Corliss Bank Safe

Home to many German immigrants, numerous breweries established themselves in Hamilton.  The most notable of these were the Cincinnati Brewing Company and the Martin Mason Company.  Prohibition brought an end to the breweries which had been active in Hamilton.
 

Martin Mason Brewery, 1923	Martin Mason employees, circa 1923