Plastic parts in the photo: Flasher "lens", cross arm to hold the targets, and, not shown in this photo, the pole and base.
Here's the target production facility. I don't know about Chandwellian. Maybe Blacksmithian.
The artwork sheet is spay bombed with matte finish, both sides, which plasticizes the paper. The lens hood is one of the disks cut in half, rolled with the small diameter brass tube, then attached to the end of a styrene rod. Cut the rod behind the hood. A bit fiddly but not difficult. I'll photo doc one if the description is not clear.