As the first all-metal monoplane bomber produced for the US Army Air Corps in quantity, the USAF Museum spent years looking for an example of the B-10 for their collection. Seven countries purchased the export version, Argentina buying 35 Martin 139Ws, including 12 for the Navy in 1938. After many years of service, the obsolete bombers were used of training and one survived as a ground instructional airframe in Buenos Airies. In 1970 it was gifted back to the US and restored at Kelly AFB, TX between 1973 and 1976. The wreck of RNIEAF Martin 139WH-3 M-574 was found in Indonesia in 2018

The only B-10 version still in existence is this model 139WA export version sold to the Argentine Navy in 1938 (their s/n 0080), and used for training ground crews as late as the 1960s; it was last used as a ground-training tool for Argentine engineering students at the "Jorge Newberry" National School of Technical Education, No. 1, in Buenos Aires. It was acquired by the USAF museum on 21 August 1970 and is now displayed restored in the markings of a B-10 from 1934.

The B-10 was the first all-metal monoplane bomber produced in quantity, featuring such innovations as retractable landing gear, a rotating gun turret and enclosed cockpits. This B-10 was an export version sold to Argentina in 1938 and is the only remaining example left of the type. In 1970 the Argentinian Govt. kindly donated the aeroplane for display at the National Museum of the USAF.

This exhibit space has changed slightly since my previous visit and so this time around a full plane shot was (almost) possible of the only remaining example of this type.