Fallschirmjaeger - I have a ZP49 12 bore which I bought new in Nairobi 40 years ago. It is as you describe except with ejectors. Plain black, no engraving - a poor man's Funeral Model. I carried it in the bush for protection (as a scruffy young American, I couldn't get a permit for a rifle back then) and hardly ever fired it. When I brought it back here I found that I couldn't hit a thing, and questions about that led me to this forum. You guys taught me about shotgun fit, I had the stock bent to fit, and as I thought it would be my only shotgun forever, I had tubes installed. Over the years you guys have made me buy nicer guns, but I still use it on rainy days and it still fits better than anything else. After forty years of moderate use, a firing pin broke and an ejector failed, both now repaired.
Between the modifications and the recent repairs I have put far too much money into a cheap gun, but who isn't a sucker for their first born?