1925 Mich. Pub. Acts 473, An Act to Regulate the Possession and Sale of Pistols, Revolvers and Guns; to Provide a Method of Licensing Those Carrying Such Weapons Concealed; and to Provide Penalties for Violations of Such Regulations, § 5.

No person shall carry a pistol, revolver or gun concealed on or about his person or in any vehicle owned or operated by him, except in his dwelling house, place of business or on his premises, without a license therefor, as hereinafter provided. The provisions of this section, however, shall not apply to the regular and ordinary transportation of pistols, revolvers or guns as merchandise, or to any member of the army, navy or marine corps of the United States, or to the national guard when on duty, or organizations by law authorized to purchase or receive such weapons from the United States or from this state, nor to duly authorized military organizations when on duty, nor to the members thereof when going to or returning from their customary places of assembly, nor to wholesale or retail dealers therein, nor to peace officers of the state.