First introduced in 1986, reference 3970 enjoyed a production run until 2004, when the reference was discontinued. During its reign, the 3970 underwent three major transformations. Watches from the first generation of 3970 were fitted with a snap solid back. However, clients soon wanted to see the movement in action, so Patek Philippe created a version with a sapphire crystal case back, named 3971. Patek Philippe finally created the third generation, 3970E, where étanche meant waterproof.

The present example, 3970E, presented as a full set with original certificate, additional case back, setting pin, product literature, fitted presentation box and outer packaging, is among the later examples manufactured by Patek Philippe. The watch is fresh to the market, furthermore fitted with a rare and attractive diamond-set black dial. The watch is in extremely well preserved condition with sharp hallmarks to the side of the lugs. The lugs themselves with very good proportions and very good fluting, overall an exceptional example.