Great helmet

It was intended at both a bayonet and a trench knife.

Thanks, that shows the blue cap was available in at least the late 1970's... We're getting warmer    I know of that book but haven't been able to source one locally yet.    

this was recovered in Rhodesia in 1978, supplied by china to Zimbabwe Liberation Forces. this book is available from- https://schifferbooks.com/

I’m not sure about this one seems to be modern made with a WW 2 badge attached, it was against regulations to poke holes in these helmets which is why some badges had slider attachments to fit onto the puggaree. The Black Watch wore a red hackle of feathers on the left side instead of the cap badge.   http://www.militarysunhelmets.com/2013/regimental-identity-and-the-20th-century-khaki-helmet

Looks to me to be a World War Two issue, can’t make out the patch but I don’t think it’s a Seaforth one, could be Cameron’s do you have a better image?

Posted on facebook, December 8, 2021, by Lillian Jakobsen, who  noted that it was found on a farm in Ljones, Norway.      

That a new on to me. Interesting design. Any idea why it is shaped like that?  mikie

Bayonet-knife produced by Deutsch Maschienenfabrik AG (Duisburg) between 1915 and 1918. It features a distinctive crank-shaped grip, designed for the Gewehr 98 rifle,  and a double-edged blade stamped "DEMAG D.R.G.M."

Absolutely delightful!  Well done, Scott.  

Simply outstanding, Scott!  That is a real treasure. Wow!  

Nice find