Spitfire XIV-FRC (RM 921) is a flying machine of a type unknown in the Cities. It appeared in the sky above Alta-Plana in 751 AT, starting an intense debate. Harry Rhodes and Cynthia Sirk were the pilot and passenger.
Axel Wappendorf, who was fascinated, wanted to have a memorial in 753 AT erected in Trahmer 1) 2). Aeroplanes of that kind did not exist in our world before 1937 AD 3), which would indicate a serious twist in the temporal connection with the Obscure World.