Fall,
Having 3 Merkel shotguns, I've done my research on their engraving and the engravers who did it. I have a list showing the engravers, their time and experience in their work, and have seen examples and how they signed their work. As an example, Gerhard Liebscher commonly used rabbits in his engraving patterns. They commonly used house style on the bottom and surrounding areas, while doing their own take on game scenes and the like. The men usually signed their work with block initials, while the women used attractive script.
Hope this helps,
Karl