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crystal size?


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The only problem with JTse sapphire crystals is their thickness. His are much thinner than standard crystals, less than half the thickness of a gen, I believe. So depending upon your case's bezel height, the top of the crystal may end up below the top of the bezel - giving it a sunken look.

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I'm not familiar with standard crystals but older cartel manual winds and DSN manual winds have the crystal dimensions pretty much spot on to gen Panerai one.

The dimensions are:

35.5+/-0.05mm diameter and 3.5+/-0.04mm thickness measured in the center.

JT's crystals are also 35.5mm diameter but they're 3.06mm thick. Thickness of the crystal is only half the trouble. There is a noticeable difference in crystal clarity and refraction between all rep crystals I've seen and a gen crystal. I've heard good things about a certain eBay seller's crystals but I've not seen anyone post comparisons.

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Yup, DSNs are good to go. Not cheap but closer to gen's and better than Jackson's/Getat's. The latter are slightly mistier than cartel/DSN sapphire, and I agree with w0lf on that point.

BTW, xtal position in reference to the top of the bezel is achieved with xtal press during the install. I prefer the one with screw top (I sold my traditional lever xtal press as soon as I bought this one) which adds much better glass height control during the install.

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BTW, xtal position in reference to the top of the bezel is achieved with xtal press during the install. I prefer the one with screw top (I sold my traditional lever xtal press as soon as I bought this one) which adds much better glass height control during the install.

So xtals shouldn't just be pressed as far as they can go into the gasket?

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So xtals shouldn't just be pressed as far as they can go into the gasket?

Not necessarily, however there's always a 'good' measure ;-)

I've 'fixed' couple of crystals on my Pam reps, where the crystal was originally mounted flush with the bezel edge. Removed them and re-installed again, this time with beveled xtal edge a hair above the bezel line.

cheers,

b

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The only problem with JTse sapphire crystals is their thickness. His are much thinner than standard crystals, less than half the thickness of a gen, I believe. So depending upon your case's bezel height, the top of the crystal may end up below the top of the bezel - giving it a sunken look.

Really? How much thinner are they? Actually, do you know how thick they are??

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  • 8 years later...

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