Thomas A. Dexter was the inventor of gang printing. His company printed a wide variety of postcard subjects as linens and photochromes in New York from 1934-1980.
The photochromes printed by Dexter have the words “Genuine Natural Color” despite going through a variety of phases. The company’s early photochromes went under the name “Dextone” and were often flat and somewhat dull in appearance. The company’s optical blending techniques improved producing richer and more varied colors over time.
The company merged with MWM Color Press in 1980 to become MWM Dexter, and they moved to Aurora, Missouri.
Source: Metro Postcard