Ditto, we need a slightly more detailed description ;)
A picture would really help more...
Also, how big is this thing? a few inches? several feet?
David Dominicus GMBH is a german company that dates back before the war, they made an enormous assortment of edge tools, axes, splitting wedges, files , tree saws/2man , bow etc, knives etc etc
Is what you are describing a rubber piece , or something roughly coated with rubber?
Almost sounds like a rubber workers tool.....