Second Army Tennessee Maneuvers.  3 miles west of Watertown. As an addition to the battalion's defense,
HQ Co. of the 5th Armd Maint Bn developed an idea thought up by Ordinance Sgt. Magazine.
The 37mm gun is the only field weapon allotted for the battalion's defense.  To increase firepower, a 50 cal.
Machine gun was mounted on the front of the 37mm gun vehicle. All parts were made and mounted by HQ personnel. 
(6 Jun 43) Signal Corps Photo: 164-0012-43-204  (Pvt. J. F. Albert)

http://www.history.army.mil/photos/WWII/Preps/WW2-Prep.htm
http://www.history.army.mil