Don Winans of Boller and Chivens testing the operation of the refurbished
6-Inch Warner & Swasey Meridian Circle

Several Naval Observatory celestial instruments were hand-carried on the airplane by Don Winans of Boller and Chivens back to the plant in South Pasadena, California. The instruments were refurbished or upgraded and again hand-carried back to the U. S. Naval Observatory.