Keywords: Sikorsky JRS-1 of VJ-4 undergoing maintenance c1941.jpeg A U S Navy Sikorski JRS-1 amphibian of Utility Squadron 4 VJ-4 undergoing maintenance circa 1941 or early 1942 The plane's forward fuselage is marked 4-J-10 Official U S Navy photo http //www history navy mil/our-collections/photography/numerical-list-of-images/nara-series/80-g-k/80-G-K-14000/80-G-K-14544 html 80-G-K-14544 from the U S Navy http //www history navy mil Naval History and Heritage Command ca 1941 U S Navy PD-USGov-Military-Navy Sikorsky JRS Fleet Composite Squadron 4 United States Navy World War II color photographs of the US Homefront |