Checking Charles Woolley's HAT-IN-THE-RING GANG, that's probably Doug Campbell's April 14, 1918, Pfalz DIII of Vizefeldwebel Wronieke of Jasta 64w. My best guess? Winslow and Campbell downed two that date. Winslow's was an Albatros and first kill of day. Lot of pix of those kills around. FM