01/31/2013. Remarks on the back of the photograph: "World's Tiniest Biplane--Ted Jenks of Los Angeles tests minute aircraft. The baby plane is only 12 ft (3.66 m) long, 4 1/2 ft (1.37 m) high, with wing spread of 14 1/2 ft (4.42 M). Ted Jenks and his little 'Meteorplane'--the tiniest biplane in the world--built for practical flying. It is propelled by a four-cylinder motor."
One of the world's first successful small, personal airplanes, and also known as the SP-1, this single-seat type was produced by the Irwin Aircraft Company of Sacramento, California, USA. Of wooden construction and powered by a 25 hp Irwin Meteor motor, some forty aircraft were produced at Irwin airport, while an unknown additional number were sold as kits.