My old shooting, and hunting buddy Tall Pine built a schimmel very much like these, that also had no triggerguard. His gun had a trigger that was slanted back closer to the wrist of the stock. To fire the gun you actually had to grip the wrist of the stock and squeeze up on the trigger. He caused quite a stir the first time he took it to rendezvous. But, he shot it for years, and even hunted with it in Oregon and had no trouble.
I can imagine if he was still around, he’d be laughing, and slapping his knee, and saying I told you so.
Hungry Horse