Tandem two-seat aircraft similar to the S-7 which had side-by-side seating. One S-6 built. It became NC98 in April 1927 when the US adopted registrations for all aircraft. Registration cancelled in 1931. Photo from: National Archives at College Park, Maryland

One one S-7 built. Similar to the S-6 but with side-by-side seating instead of tandem seating. Thomas-Morse called it the Sociable Seater. It was sold and used for aerial survey but it does not appeared to have been around when registrations became mandatory. Photo from: National Archives at College Park, Maryland

This was the first MB-3. After early flight testing at Ithaca it was shipped to the Air Service's Engineering Division at Dayton Ohio for static testing. It never flew again. Photo from: National Archives at College Park, Maryland