This 1/20 scale trade-show model was a proposal by Fokker, dated about 1935. Fokker was the exclusive European importer for Douglas Aircraft at the time, and this conversion was to make bombers out of existing commercial DC-3 airliners.
In addition to bomb bay doors behind the wing box, the DC-3 bomber featured a couple of machine gun turrets on the roof and a bombardier/gunner blister under the cockpit. DC-3 passenger windows were not covered up, so I assume these aircraft could be un-converted and returned to commercial service, at the end of the conflict.
The model is all-metal, with retractable gear, and features the signature plate of J. van Pelt, model maker for Anthony Fokker.
Any references or documentation about this Fokker project would be greatly appreciated. Thank you.