• 56-358 US Army #1659. L-20 No. 660. Command A-11. Delivered 24-Jan-1957. Built as L-20A and re- designated U-6A in 1962.
Note: Originally serialed as shown above but if it survived, in approx 1965 would have had the additional “0” added to conform with US Army & USAF agreement on numbering to represent the service the aircraft operated with.