No license herein provided for shall be issued in any county other than the county wherein the disabled veteran is a bona fide resident; provided, that should a disabled veteran holding a veteran’s license desire to engage in a business or occupation in a county in this state other than the county in which he has secured such veteran’s license, he shall produce the license issued to him in the county of his residence to the probate judge of the county where he desires to do business; and, if the license in such other county together with the license issued in the county of his residence does not exceed the $25 exemption herein granted, he shall be exempt to such extent, and such probate judge shall countersign the license obtained in his county without charge or fee, and it shall thereafter be as valid as though issued by the probate judge of the county of his residence.