The Jeffrey Company is a diversified investment firm managing a portfolio of stocks and bonds. It originated from the Jeffrey Manufacturing Company, which was a leading coal mining machinery manufacturer. Today, The Jeffrey Company does not manufacture but provides parts and service for its legacy machines. The company's unique selling proposition is its historical legacy and diversified investment approach. Its target audience includes investors and those seeking parts for Jeffrey machinery. Jeffrey Management Co. is not explicitly detailed in the provided information, but it may be associated with The Jeffrey Company's operations or a separate entity focused on management services.