"Amber N. Brunson was born in Cedar County, Missouri October 22, 1905.  In 1927 he started the repair service with Gallup Map and Supply in Kansas City on a partnership basis with Mr. Gallup.  In 1938 he purchased the other half and thus owned all of the business.  March 26, 1946 the Brunson Instrument Company was incorporated under the laws of the state of Missouri."

Reference:  Smart, Charles E.   The Makers Of Surveying Instruments In America Since 1700  Troy, New York:  Regal Art Press.  1962