I photographed these Lincoln PT examples at Oshkosh, Stonehenge and the Western Antique Aeroplane and Automobile Museum (WAAAM) in Hood River, Oregon.
• PT: Powered by a 90-hp Curtiss OX-5 or 100-hp OXX-6 V-8 engine (28 built).
• PT-K: Powered by a 100-hp Kinner K-5 five-cylinder radial engine (18 built).
• PT-W: Powered by a 110-hp Warner Scarab radial engine (5 built).
• PT-T: Powered by a 90-hp Brownback Tiger radial engine (5 built).