A Vintage Photos Theme Park photo for the theme of Watch the skies! -- UFOs, airplanes, birds, clouds, or anything else that might be up there.

The hard-to-read handwritten note on the other side of this divided-back, real photo postcard says, "Rose sitting, [Lill?] Jennings standing, ... and myself at Yarmouth."

The Yarmouth location and the roundels on the wings of the airplane suggest that this is a souvenir photo from England. But what's the meaning of "O.K" and "R.U." on the fuselage? And was there actually a three-seater biplane that looked something like this?