The aircraft was painted silver with a winged logo on either side that featured a W(Warren) and a M (Montijo) with Landau Sedan written below it.
It featured conventional landing gear and was powered by a 260 hp (194 kW) 9-cylinder Salmson 9 radial engine.
The Mason Aircraft Company installed six fuel tanks in the cabin with an interconnecting tube and a receptacle for aerial refueling mounted above the wing.
[3] The aircraft was first flown by Warren, and Montijo, on 3 March 1928 at a field that would eventually become the San Luis Obispo County Regional Airport.
On 29 April 1934, the aircraft crashed in a landing accident at Long Beach, California[1] Data from SkywaysGeneral characteristics