Trim Tab Position Indicator Weston Model 883 US Navy R4Q USAF C-119 Boxcar

This is a Trim Tab Position Indicator, made by Weston Type 7H Model 883 from the early 1950's. Has a small US Navy anchor stamped symbol on the back. Used as part of the F-1 Autopilot in the Fairchild transport aircraft C-119 (US Air Force designation) and R4Q (US Navy designation).  See photo of the indicator mounted on the pilots switch panel from the C-119 flight manual dated 1950.  Measures 3.25in diameter and ~3in deep. It is in very nice condition given its age.  The dial markings are clear and the glass and case are intact. See photos.