Public domain
Antiaircraft gun carriage. Assembling the traversing gear and bearing on a thirty-seven millimeter antiaircraft gun carriage. These precision-built ball bearing installations are vitally important, for on their unfailing smooth operation depends the gunners' ability to follow his swiftly moving targ
From the collection of Library of Congress. Free to download, adapt and use — no permission needed.
Credit lineAntiaircraft gun carriage. Assembling the traversing gear and bearing on a thirty-seven millimeter antiaircraft gun carriage. These precision-built ball bearing installations are vitally important, fo. 1941-01-01. Palmer, Alfred T., United States. Office For Emergency Management. Farm Security Administration/Office of War Information Collection, Library of Congress. Public domain.