400hp Kirkham K-12
info from AeroFiles
Photo above clearly shows a tail number of "40054," but all recorded registrations have that number as the 18-T triplane. Misapplied or a sign painter's error, then corrected after the photo was taken? Just one of many mysteries that might never be solved. (— K O Eckland)
Aeroplane Photo Supply No. 4262
Aeroplane Photo Supply No. 4263
