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therefore 200m is harder to achieve without making it disproportionately thick
Pff, pretty sure I've seen dudes on YouTube making a water resistant watch good for 300m just by putting oil in it... Why doesn't someone just do that in the factory? Probably best as something with wireless charging, I guess, but still.
Kimmo-
good for 300m just by putting oil in it... Why doesn't someone just do that in the factory?
They did. Bell and Ross had one called the Hydromax. Rated to 11,100 metres but only 39 mm. https://uniquewatchguide.com/bell-and-ross-hydromax-dive-watch/ I've got one sitting in a drawer. Battery changing has to be done at the factory, because of the oil. I think they adapted it from a Sinn. Sinn have had at least 2 oil filled dive watches, including the UX and the Hydro.
tertius
nick_h.
All Gs are 200, was kind of what I meant. 200m WR is part of the original G-Shock spec so they won't put anything less in a G-Shock. Baby-Gs are the only exception AFAIK, and you can understand that because the point of them is that they're smaller (and therefore 200m is harder to achieve without making it disproportionately thick).
It's kind of surprising the Frogman isn't more - I would have assumed 300m - but I suppose it doesn't need to be to be a certified ISO diver.