texasmade
·According to Tim from Govberg and watchuwant or whatever his videos are called, the sapphire sandwich is slightly thinner than the hesalite. He says the hesalite is 14mm while the sapphire comes in at 13.7mm.
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Hesalite for me. I don't mind about the scratches and prefer the look. Also with polywatch it's fastly repaired.
Sapphire for me. There's endless debates about the "warmth" of hesalite and the "milky ring" of sapphire. For me, one is not better than the other; it's just different. I could live with either one, looks wise. But I choose the sapphire sandwich because it IS more scratch resistant. Plus, I get to see the movement, and it is better finished than the movement in the hesalite.
Same thing with the watch. Sapphire is a much more high-performance crystal, as we all know. None of us are taking it into space, so the fracturing qualities of hesalite don't really mean much to us.
What exactly is higher performance? That is can take more force for a given amount of deflection? (although dome shape of hesalite makes it a bit stronger then if it were flat) Or just that sapphire is more scratch-resistant? I am not sure which properties you are referring to.
The scratch resistance.
I don't understand why so many people (not saying you) are so quick to dismiss this advantage over Hesalite. It's not a small improvement.
I think it’s because when acrylic is scratched it can be fixed so easily that the “advantage” in practice is actually very small. Given the drawbacks of sapphire, having to polish the crystal periodically is a small thing in the big picture.
Increased scratch resistance is not high-performance *to me*, as it is just an aesthetic issue. I actually have more issues with the sapphire crystals on some of my watches then I do on the hesalite. Part of that is due to anti-reflective coatings some manufacturers use -- those coating can wind up looking crappy and there isn't anything you can do short of replacing the crystal. But I also don't really have an issue with scratching up my watch crystals; the TinTin that has been my daily wearer for over 2 years only has one or two small marks from me (and a much bigger one from the initial owner). When it comes to specifically talking about Speedmasters, I find the sapphire crystals give the watches a less casual/ everyday look, which is an issue for me as I prefer casual. I make an exception for the #PCA Speedy, but it isn't exactly a Speedmaster pro anyway so I can tolerate it.
Hesalite vs sapphire is definitely a personal decision, and having a mix probably works fine for many people. It took me a little time to come down on one side of the 'debate', and it was purely based on my own personal experiences. You would think as an engineer sapphire would make more sense to me, but a good design needs to have a soul, which I feel more when I look at a Speedmaster that has a hesalite crystal.
It is actually pretty easy to remove external anti glare with a mild abrasive in my experience. Toothpaste will do it is some cases. I think you may have replaced a lot of sapphire crystals unnecessarily. In any case it is rare for Omega to use it but I agree it looks poor when marked up. If the cost of a replacement sapphire Speedy crystal wasn’t stratospheric, I would have it every time, I certainly wouldn’t have acrylic on any other modern watch, but the cost is a worry.
Lots of previous discussion- lots to read!
https://omegaforums.net/threads/sapphire-vs-hesalite.33901/
https://omegaforums.net/threads/1st-timer-here-speedy-pro-hesalite-or-sapphire.58380/
My take though - for standard speedy, hesalite. Maybe for some LE dials I would want sapphire. But definitely not for speediorite!
The reality is I haven't replaced any sapphire crystals unnecessarily -- they just look a little crappy. But I can still tell the time, which is the reason I have them. (I do not wear them for fashion; I have a couple 'dressy' watches for that, which I only wear once every year or two).
I have a Seiko quartz that was my only watch for almost 30 years. I cracked the sapphire crystal twice climbing around on scaffolding, etc. for work, and also managed to put a few other scrapes on it here and there. I think it was good training for me, as I subconsciously shield my watch these days when I am climbing around.
Yes I too have destroyed the sapphire crystal on a Seiko. I was climbing to see a waterfall in Morocco so at least it is a cool story. I share your pain!