A titanium Tuna wrapped in ceramic is a “dish” best served 1,000 meters underwater. In 1986 Seiko introduced the first diver’s watch with a ceramic outer case and the lightweight, corrosion resistant titanium case housed a quartz movement. The 1,000 water resistance of the watch made it suitable for saturation divers. And this watch comes back to the surface with the Seiko Prospex 1986 Quartz Diver’s 35th Anniversary Limited Edition watch. The S23635J1 is a reborn and tweaked Tuna.

As you might well know, Prospex is a combination of the words “professional” and “specifications”. The nickname Tuna was first heard back in 1975 when Seiko introduced a large round mechanical diver’s watch without lugs. The first Tuna (ref. 6159-7010, a.k.a. Grandfather Tuna) was water resistant to 600 meters and had a Hi-Beat 10Hz caliber. It didn’t look like a tuna fish but like a tuna can, but the word “can” got canned, and now we know these particular lug-less watches as Tuna’s.