The blade says Chrome Steel.
I bet the 'Tungsteel' is a brand name. I doubt they would need to use the bluing if that was made out of real tungsten alloy.
My wedding band is Tungsten Carbide and is cast formed. It's been on my finger every day for nearly six years and still has a mirror polish. My wife's white gold rings have been re-plated at least three times.
My ring came with a card for my wallet too. It says to use a vice to break it off or something. I guess if you have an accident and mangle your hand emergency responders have saws or some other tool to cut rings off.
I also can never have my ring re-sized. I had the option to pay for "insurance" in case I gain or lose weight to trade in for a different size. I chose not to. It wouldn't be the same ring. I'll put it on my pinky before I trade it..
Anyway, I don't think it really is Tungsten. It would have been awfully expensive in the 40's to make blades that hardly ever need replaced. I don't know when Tungsten steels became used commonly, but it wasn't a great business plan for Personna either.
To play "Razors and Blades" one of them needs to be replaced or wear out once in a while.
If they're not super expensive buy some and see.

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