The Bombardier predecessor to the CL415 with the radials is a CL215.
I had a job in the paint shop that painted them when I was a teenager. My finger tips got to know every rivet on the aircraft intimately
They took off from Montreal and flew to us in Bar River, Ontario with bare metal.. left painted for around the world.
Got to paint "Do Not Step" in yugoslavian, czechoslovakian, french, spanish, etc
p.s. the Grandparent (PBY) looks like the ones I remember from Newfoundland.