A 9-linge Model with a canopy to safeguard the crystal (a little an obsession at the time, as we’ll see), the design didn’t fairly consider off and these are extremely scarce and really highly-priced. Even though not just as much of the residence title as Rolex, Most likely, Audemars Piguet https://www.watchesworld.com/a-history-of-watch-reference-numbers/