The WW2 era blades were not really "made with care". They were made as fast as humanly possible to get as many out in as short a period of time as physically possible. That's why the specs changed from "round, threaded peened over pommel-tang" to "round, unthreaded, peened over pommel tang" to "rectangular, peened over pommel tang" to "rectangual, pinned, no peening pommel tang" - each change made it easier, cheaper and faster to produce a usable knife. The stamps went from "on the blade, both sides" to "on the guard". The guards could be stamped as they were stamped out, saving the time it took to stamp the blade, turn it over and stamp the blade again. The pommel pieces themselves changed from the heavier 3/8" thick pieces of steel to 1/4" thick. Saved 1/3 the material, could make 3 pommels instead of 2 from the same amount of metal. "Made cheaper by government specs." The rectangular pommel-tang pommels are stronger than the original threaded ones. The threads weakened the pommel connection and they broke off.
I HAVE compared the WW2 era blades to the "modern" ones. I have over 50 WW2 vintage Kabar 1219C2/USN-MK2s, over 30 Camillus WW2 versions, 19 PAL and Robeson versions. Then I have another 30+ Viet Nam Era and later "modern versions" from every US manufacturer that made them under government contract. Every single one of the "modern" versions have been built just as solidly, if not more-so, than any WW2 version. The MSI version is not very well finished, looks like poop, but is strong as an ox. I have a couple of dozen Kabar wanna-bees made in various countries. Some of them are good. Some are caca.
The variation from 1 WW2 version to the next is about the same as from 1 modern version to the next. Every single one of these knives from WW2 to present is finished by hand. There are going to be differences between any 2. They are made by humans. I do not include the wanna-bees in any comparison.
Could they be made perfectly, exactly identical and perfectly lined up every time.
Yes.
But you couldn't afford it.
No clue as to why Amazon won't refund. That's on them.
You didn't buy it at retail from KABAR, so to expect KABAR to refund your full purchase price is ludicrous. KABAR sold it at WHOLESALE to whoever sold it to you, whether Amazon themselves or one of their jobbers. IF KABAR sold it to the shipper. I've never heard of a GRAY forest green Kabar. Maybe you just got a "Kabar-style" knife that wasn't made by Kabar. I see those on fleabay all the time. That's why we need pics of the knife and/or box.