A good replica of the Mark One, 1918 bronze handle trench knife is not available.
The only current replicas are absolute trash, made in China.
The handles are not even close to the original US Mark One or even the French made Au Lion Mark One.
The latest version may not even have a real brass handle, many ads say "brass colored".
The blades are stainless steel and better shaped then the older Japanese replicas, but thinner then the USGI originals.
These junk knives are all that's available now, and are sold by many online places.
Best advice...DON'T. They really are trash.
http://www.smkw.com/webapp/eCommerce/products/Combat+Ready/Combat+Ready%26%23153%3B+1918+WWI+Trench+Knife/CO032.html
Note that the "scabbard" is the same as used on the older Japanese made version and are total junk.
It's not unusual to open the box and find the scabbard has separated and fallen apart.
The belt prongs are ridiculously weak and can be pulled off easily with your fingers.
In no way could the scabbard be actually used to carry the knife.
A better knife was the older 1960-1970's Japanese version. The blade was stainless but not as well made and shaped as the current junk.
The handle was brass but still not like an original USGI or French Au Lion Mark One.
Some of these were sold to GI's passing through Japan to Vietnam, but the scabbard was the same weak trash as the current junk.
The best of them all is one I've never been able to identify, other than that it "may" have been made in Japan, or at least the blade may have been. My knife has no markings on the blade or handle as to where it was made.
The blade is stainless and as thick as the original WWII Landers, Frary, & Clark. However it's shaped differently then the original.
What made it so good was the handle is cast from bronze like the original US Mark One, not brass like most people think, and it was made using an original L,F,&C handle as a mold master.
If you look close on mine you can just make out where the L.F.&C 1918 mark was removed.
As said, I've never been able to find out where or when it was made, but I have seen one other with a carbon steel blade just like my stainless, with "Japan" stamped on the blade, but no maker markings on the handle.
I've never seen any kind of scabbard with one of these.
My "Japanese"??? Mark One. Scabbard not original to the knife. I made this one from sheet metal.
Note that a real bronze L.F.&C handle was used as a mold master. Blade is stainless, as thick as an original but shaped differently.
The quality of this knife is such that it could have been used in actual combat since it was about as good as an original US version.
The original Landers, Frary, & Clark Mark One trench knife, often improperly called a "1918" due to the handle mark.
How the Mark One was intended to be worn..... On the INSIDE of the belt.
When issued in WWII, too many people didn't know this and wore them on the OUTSIDE of a cartridge or pistol belt.
One pull and the prongs on the scabbard would break off.
The scabbard was iron, copper plated, then chemically blackened. The prongs were attached with copper rivets:
The US Mark One made in France for the AEF. This is the Au Lion version. Real brass handle, blade same as used on the French fighting knife, European bayonet type steel scabbard with welded on prongs.
The older 1960's-70's Japanese replica looks more like this then the current trash.
Best advice is to haunt gun shows or the gun auction sites and try to find one of the older Japanese versions.
The handle looks pretty much like the L.F.&C but doesn't have the spikes on the knuckles.
It's still kind of junk but not nearly as bad as the current crap.