If you don’t mind, I would like to restrict this discussion to the question of whether or not the absence of proof/acceptance marks is a matter of concern that would alarm a more knowledgable collector than I. If that’s a serious issue related, let’s say, to the authenticity of the gun, then price becomes quite irrelevant to me—I skip this gun and keep shopping.
Still, your request for more info is perfectly reasonable. Here’s the URL. with any luck, nobody will swoop in and buy it before I make up my mind. this page contains everything I know about the gun.
URL:
https://simpsonltd.com/dwm-1918-military-8/