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The ES-EX is by CF Ern. They are good razors with hard steel. Don't know if Ern made a bad razor but a looks like a little toe wear on that one.

Don't know the one you bought but looks good.

My advice is stay away from the shops near surfing beaches.

The thing with antique stores is they often think rusty old razors are worth more than they really are.

There was/is an antique...