Sorry I was getting confused between Poland and Czechoslovakia in my search for Tutor connections.
I should think it is possibly one of the ones from the Baltic states or Denmark or Greece which the Germans “borrowed” and was lost in transit or used by a school set up on Czech territory. I am sure that it would have made sense to centralise similar types from a spares point of view.

Serial Number 626 was a Tutor constructors number which falls into a block shared by the Danish Navy and Greek Air Force. Apart from this I have precious little on Tutor serials and so much was destroyed in the fire at Avros.

John