Union labels are a good clue but they don't always mean vintage. Union labels have been appearing in US-made clothing for over a hundred years--so it's true that a lot of vintage clothing has them.
But, in fact the labels show up in clothes made after 2000. Look for labels that contain the letters ILGWU (International Ladies' Garment Workers' Union).
Since 1960, clothes have been required to carry labels saying the fiber content (with percentages) and place of manufacture.
If your garment has a retro-looking label without any fiber content, it might be older than 1960.
American women have made great strides in gaining independence and more equality in relationships, but some ladies feel that this evolution comes at the price of chivalry.But a metal zipper in a dress is often a good clue for vintage status.Keep in mind that an old dress could have a plastic zipper if the original one was replaced. If your garment has a sewn-in label stating how to care for it, it was probably manufactured after 1972.Check out the following vintage dating traditions, and cast your vote.Should we bring these back or keep them in the past where they belong?