Victorinox Swiss Army

What note is the tweezer in the Swiss Army Knife?
There was an article years ago, in the Smithsonian, about the versatility of the original Victorinox Swiss Army Knife. It mentioned that the tweezer can be uses as a tuning fork. What key, please?
You know, tuning fork? You twang it and hold it up to your ear as a reference for tuning an instrument; maybe a guitar? Twang? Anyone?
I wasn’t imagining the article. Didn’t anybody else read it? Argh.
I’m not familiar with the article or how true it is, but if they made it to double as a tuning fork, it’s probably A at 440Hz. That’s usually the standard frequency.
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