Need help on this tang stamp, maker

[Paladin]

I am attaching a rather grainy photo of the tang stamp on a small jack knife. To describe is even difficult. There is GERMANY and just before that is some sort of logo that looks heart shaped and with something (arrow?) sticking out of the bottom.
As always any help would be greatly appreciated. I can find nothing in my books.

Here are a couple of photos that are a little better.

[muskrat man]

the mark looks like a spade (hearts, diamonds, clubs and spades)

[Paladin]

Very good, MM.
Herder's used that according to Levine. Maybe that's what it is.

Ray