Help with Mystery SAWBACK KNIFE ? ? ? ?

[ersatz]

I'm hoping the membership can help shed some light on this unusual sawback knife. 1. WW1 or 2? 2. Country of origin? 3. Purpose? 4. Unit marking? And any & all other details........ I provided a description and photos.

The unit is light weight and nicely balanced. The blade itself measures 11.25 inches, with an overall length of 17 inches. It has a nicely ground cutting edge on top with sharp double sawteeth on the bottom. There is a solid brass cross guard with the top quillon having a hook to secure the retaining strap. Unit marking is 3.J.25. on guard with WK on the ricasso and a 12 on the inner guard. The frog is riveted to the scabbard. Scabbard throat has a metal guide to protect the leather from the sharp sawteeth. A well made piece. The blade cuts a clean 3/16" kerf. Thank you for looking! TED......

 

[ersatz]

I have to give credit when credit is due, and AndyB must be congratulated for helping to unearth some details pertaining to my Mystery Sawback Knife. After doing some investigative research, Andy reported that this piece appears in Eickhorn's 1933 Catalog of Blankewaffen under item #1374. Please refer to the attached photo which appeared in the catalog (click to enlarge). Many thanks for you help Andy !

 

[luftpirate]

Very cool Ive never seen one!

 

[iron bender]

This is awesome.

 

[grimlin13]

Congratulations on getting it identified. Ever since you made your post I have been checking back to see if it anyone knew anything about it.
Thank you Andy for a job well done.