There have been auto Tunas so I wouldn't think. Spring Drive is more accurate and, in terms of robustness, the case is key to that. I assume it has a monocque design but even with a case back, I'd have a lot of faith in a Seiko diver.Doesn't the spring drive kill the robustness of the tuna?
Food for thought...
From what I understand, the Spring Drive technology is more shock resistant than a standard mechanical movement because of its design differences.I understand auto tunas, but for some reason I associate spring drive seiko as being more sensitive to shock than an auto, let alone a quartz... I mean we all love tunas, but weren't they originally designed with robustness in mind for commercial divers??
(Yes, I know no one uses watches in diving these days. Everyone uses computers, and in the case of commercial and sat divers, someone else is watching the time. I'm just saying...)
Ahh makes senseFrom what I understand, the Spring Drive technology is more shock resistant than a standard mechanical movement because of its design differences.
Is this a photochop/joke? Monster hands? Can't find it on the Seiko Website.