The Patek Philippe 3970E was introduced around 1992 as the third series of the 3970, with the ‘E’ signifying ‘Etanche’, French for waterproof. This series was delivered with both a closed as well as a see-through case back.


The Patek Philippe 3970E was introduced around 1992 as the third series of the 3970, with the ‘E’ signifying ‘Etanche’, French for waterproof. This series was delivered with both a closed as well as a see-through case back.
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