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Any person over the age of sixteen years, who shall have in his possession in any city, village or town of this state, any pistol, revolver or other firearm of a size which may be concealed upon the person, without a written license therefor, issued to him by a police magistrate of such city or village, or by a justice of the peace of such town, or in such manner as may be prescribed by ordinance in such city, village or town, shall be guilty of a misdemeanor.