Knowledge Center — tuna

The 1975Professional Diver's 600m Re-creation The 1975 Professional Diver's 600mOriginal model It all began with a letter from Hiroshima. The correspondent, a professional diver, explained that no watch could withstand the stresses and strains he experienced when working at depths greater than 300m. Inspired, Seiko engineers got down to work. Years of research development paid off in 1975 with the introduction of the world's first titanium cased diver's watch: the Professional Diver's 600m. This model has a titanium one-piece case and an outer case protector as same as 1975 original.The case construction and dial layout are loyal to the original, as...

The SBDX013 - An Icon Wears Black The Seiko Tuna is one of the most iconic wristwatches today.  The tuna style watch took over 7 years to design.  They started this long design process in 1968 when a saturation diver complained that his Seiko watch couldn't take the abuse.  Seiko had just gotten into the dive market three years before.  The original Seiko Tuna was released in 1975 by a design team lead my Ikuo Tokunaga.  That watch had a lot going for it, so much so that Seiko was awarded 20 patents.  Later, in 1978, Seiko developed the first saturation...

The Seiko SRPA83 PADI Dive Yes, it is a great time to be a lover of Seiko Dive watches.  After what seems to be years of the old tried and true dive models, the last 3 years of Seiko dive watches have been great.  Seiko early last year re-launched the turtle series with a nice affordable movement, the 4R36.  The 4R36 is nice because it can be charged with a hack motion or by winding it.  To have this movement and in a classic turtle package, it is no wonder the Seiko Turtle has been so popular. Seiko PADI Dive...