The Panerai Submersible is the most robust watch Panerai makes today, a highly water-resistant dive watch with large luminous indexes and a unidirectional bezel. Until recently, the Submersible was part of the larger Luminor collection, but since 2019, it’s been broken out as its own proper collection of tool watches. Today, we’re looking at the limited edition stainless steel Submersible Azzurro, Italian for “light blue.” Its design blends those of the two core steel Submersibles released early last year: PAM00683, with its black dial, and PAM00959, with its blue ceramic bezel insert.