Four American military instruments, WWII era, all in original cases, including K20 aircraft camera, serial number AC-42-69791, with red and yellow filters and film threading plate; aircraft plotter, manufactured by B.K. Elliott Co., serial number 18070, in wooden box with original drawing and material labels affixed, with envelopes of band adjusting pin and wooden mounting screws; brass chronometer, accompanied by mounting ring, in wooden display case; along with Navy azimuth circle, 1942, serial number 5205, with "Mark 3 Mod. 2 Bu. Ships N. 5205", in original box with contract number, wear on all consistent with age and use, sold as found.