Please Help Me to Identify this Trenching Club

[fearn]

Originally Posted by graeme gt

A couple of trench clubs top one is Brit private purchase springy one German.

I'm a little curious about this thing the Germans have with spring clubs. A long while ago, a friend purchased a replica spring baton to see how it worked, and the best we could tell is that it didn't hit as hard as did a solid rod. The spring bent to absorb the impact.

How old is this idea? Is it just some sort of souped up black jack?

Best,

F