MPN11 - photo 10.
My late father helped assemble those at Drigh road.
According to him the had no manuals (Ikea or other)
and had to work out wow to do it. Also no "airflow bench"
for engine setup, he had just done the course, I believe at Pratt
& Whitney, yes I know it was a Wright engine.
Late response as I have been 70 days at sea, virus dodging,
or at least the Captain was.