USS Preston (DD-19)- 1 in. Cast Steel By-Pass Valve for Pressures from 101 to 300 Lbs. - NARA - 117877244.jpg
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USS Preston (DD 19) 1 in. Cast Steel By Pass Valve for Pressures from 101 to 300 Lbs. NARA 117877244, USS Preston (DD-19), US National Archives series: Alphabetical Series of Ship Engineering Drawings, Images from the National Archives and Records Administration, US National Archives location: other, USS Preston (DD-19): 1 in. Cast Steel By-Pass Valve for Pressures from 101 to 300 Lbs.
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