I've seen lots of reloading presses over the last 50+ years. I can't say I've seen one like that.
It's very similar to some of the old CH and Herter's offerings.
Do the dies have any manufacturer's markings on them. Back in the day, dies were proprietary to the press manufacturer. They weren't standardized in the manner we enjoy today.
Those dies don't appear to have the standard 7/8NC pitch threads.
Some small machine shops even produced very limited quantities of reloading equipment, simply because there were so few places that actually carried the stuff.
I knew one old gunsmith at Harkley and Haywood that made up all of his reloading equipment. Mostly because he could, but he claimed that his stuff was more precise than anything he could purchase commercially. That included presses, which he sold at H&H as well as custom dies he would make up.
Nice gift. Maybe the fellow can shed some light on its origins.