Is there some reason that a diver would prefer to wear the watch on the right hand regardless of handedness? I saw some Nixon watches on display at a surf shop when I was in vacation in Hawaii, and noticed a number of left-handed models. I am left-handed and wear my watch on the right hand, which means the stem is on the wrong side and I have to take it off to make adjustments. I have one left-handed watch with the stem and chronograph buttons on the left side. I have never seen such a big selection of left-handed models by one manufacturer. The site doesn’t call them left-handed, they just mention that the stem is in the 9 o’clock position.
The most critical point during the dive to monitor time is during ascent and a three minute pause at 15ft (5m) before final ascent to the surface. The diver may need to add or release air from his BCD to control buoyancy — and in standard diver’s gear configuration that is done with the left hand. If the dive watch or dive computer is on the right wrist then the diver can monitor that while simultaneously adjusting buoyancy.
Very clear–thanks for the education!
That seems like a convoluted explanation. The 3 minutes doesn’t have to be exact - there’s nothing wrong with staying more than 3 minutes. And it’s trivially easy to hold the BCD valve up while rotating your wrist enough to see your watch. Given that no one else makes left handed dive watches, I think it’s just a sales gimmick.
Nixon watches: the water gate is open only to the left.
Well, maybe, but why would you include a gimmick that makes it harder for right-handed people to use your product?
I’ve seen numerous makers of left handed dive watches.
Seriously, how many scuba divers use watches anymore? Everyone I know uses a dive computer or at least a bottom timer. Granted, some of those computers (example) can look a bit like a watch, but more often they’re noticeably bigger and not even worn on the wrist like a watch.
And I’ve never met a recreational scuba diver wearing her computer on her right wrist. Always on the left.
Here is a watch similar to one that I have that the manufacturer specifically calls “lefty”. It’s a chronograph but not a diving watch.
FWIW I’m right handed and I wear my watch in my right hand. Not relevant, I know but wanted to say it 
Wow, I never knew watches had chirality. Ignorance fought.
How about this Seiko SKX007 with the crown at 4:00? If you just can’t decide between 3:00 and 9:00.
A nice thing about left hand crowns is that it doesn’t dig into your wrist when you’re riding your bicycle and wearing your dinner plate sized watch.
From the chronomaster website,
It was also mentioned that the stopwatch is easier to operate with the button on the lower left.
I wear mine on the right, for the same reason as Iggy.
The watches in the OP wouldnt be much use for scuba because they dont seem to have a depth gauge.
Just my humble experience watching thousands of divers… I worked as a dive instructor in the Caribbean… and wear my wrist mounted dive computer on my right wrist.
I think 4 o’clock is a good position for that reason. I have a Seiko like that that I’ve worn for 16 years and never felt the crown or even really noticed it’s position until I had to send it to Seiko to be fixed in June. I couldn’t find a replacement watch with a 3 o’clock crown that wasn’t torture to wear.
A diver’s watch and a separate depth gauge is how it was done for decades.
I wear both my watch and dive computer on my left wrist.
I wear my dive computer, which looks like a slightly oversized watch, on my left wrist. The same place I wear my regular watch when above water.
It never occurred to me that it was a bad place to do so. And I dive routinely with master instructors, and then go drink with them. I expect one of them would have commented on it, even if it was the “there’s a tiny chance it would ever matter, but you should know…” type of thing.
-D/a