The 737th Maintenance Battalion Distinctive Unit Insignia, also referred to as a unit crest or DUI, was originally approved on 30 March 1973. Crimson and blue, the dominant colors used for the insignia, are traditionally associated with Maintenance units, while the buckeye at the center is a symbol of the Ohio Army National Guard.
A spear in the center reflects command authority and readiness, while the wrenches bookending the spear symbolize operating efficiency; combined, they represent the overall mission and capabilities of the Battalion. The wrenches and spear are also a reference to equipment and tools used during Battalion operations. “Support Unlimited” was the Battalion motto.
Organized in 1963, the 737th Maintenance Battalion was inactivated in 2007.
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Distinctive Unit Insignias are worn by all Soldiers (except General Officers) in units that have been
authorized to be issued the device. It is worn centered on the shoulder loops of the Army Green Service Uniform (AGSU) and the blue Army Service Uniform (Enlisted only) with the base of the insignia toward the outside shoulder seam. DUIs are not worn on the Dress variations of either uniform, however.
For Enlisted personnel, the insignia is centered on a shoulder loop by placing it an equal distance from the outside shoulder seam to the outside edge of the shoulder-loop button. Officers (except Generals) wearing grade insignia on the shoulder loops center the DUI by placing it an equal distance between the inside edge of the grade insignia and the outside edge of the button.
Full guidance on wear of the DUI is found in DA Pamphlet 670-1,
Section 21-22, "Distinctive unit insignia" and 21–3(d) and (e),
"Beret" and
"Garrison Cap," respectively