OK, what doesn't make sense? Porcelain enamel is the baking of glass onto the dial. This is how a stove, for example, is finished. It is so durable that pocket watches from the 1700s have mostly intact dials. Because they do not wear like more modern dials, there is no need to "refinish" them. Because there is no need to "refinish" them, no one does.
Does this help?
Tom
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