Remarks by Steve Keyser: "Mid Plane Sales & Transit Co. as seen in the photo below, was started by Mark Hurd (a rather famous fellow in aviation circles) sometime before 1920 at Speedway Field. Speedway Field was expanded over the years as Wold-Chamberlain Field, later Minneapolis-St. Paul International airport. Mid Plane Sales & Transit was sold to Universal Air Lines around 1920, a forerunner of Trans World Airways."

Read also the type remarks on page 10524.