Originally Posted by
creweite
I think a D registration is earlier than 1939. The aircraft were banned because it was unable to recover from an extreme nose down situation and resulted in fatalities. A later corrected version was flying on a PFA permit to fly, and a lot of French aircraft of similar concept flew well.
This Flea is a relatively modern replica. It is more accurately BAPC 77. G-ADRG has as far as I know never been issued. Thus it is a "dress" registration. Agree the "D" series would have been before 1939, I think 37 but not checked it.