Bought this today for a fiver at a show, needs identification. Looks German, marked K.K.M.4L/6 6597 a/32. Has heavy steel vane that spins freely at the top but engages to spin in thread downwards to a stop. Looks like there are two lead shear plugs or screws that hold the vane rod in place with a firing pin attached which looks like a screw but it's not. Needs identifying can anyone help.
It looks like the vane either spins out of place by water/ air or the rotating spin of the projectile so the vane rod with the firing pin at the end shears from its lead pins when it hits its target.
It looks like the vane either spins out of place by water/ air or the rotating spin of the projectile so the vane rod with the firing pin at the end shears from its lead pins when it hits its target.
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