Photo No. 74: The shoulder patch shown in this inset is a bit of an enigma, due to the fact that the color of its four quadrants and outer ring, when combined, do not match any of the official color combinations that were adopted in March of 1918. The yellow outer-ring is indicative of a unit belonging to the 69th Infantry Brigade. While the quadrant colors could be those of the 137th Infantry Regiment. However, the prescribed color combination of one blue, and three yellow, have been reversed, and the color black has been substituted for that of blue … Given those two discrepancies, reaching the above conclusion is a bit of a stretch. A more likely explanation of this color permutation is that this insignia belongs to an organization within the 69th Infantry Brigade, but bears the incorrect outer-ring color.
Two of the Doughboys in the background photo are wearing shoulder patches comprised of a similar combination of yellow and black quadrants. Those insignia also appear to have a yellow (or other light color) outer-ring.
Background photo courtesy of the John Adams-Graf collection
Inset courtesy of Griffin Militaria.com