Roffensian wrote:
The platinum used in watches is 850 Platinum (you can see it on the caseback of the Navitimer listing) - that's 85% platinum and 15% iridium by weight (slightly less platinum by volume). That gives a hardness rating on the Vickers scale of around 160 (higher is better) compared to between about 150 - 200 for 316L stainless steel.
Good eyes there Roff! I didn't spot that on the back of the case.
However, some countries like the States insist that in order for a metal to be stamped as "platinum" it must be 950 parts platinum per 1000, which even with iridium making up the other 50, only has a Vickers rating of around 80..... which is thus considerably softer than 850 due to the higher platinum content. Anyway, I guess this is going to bore a heck of a lot of people here!
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My wrists are 6.75" about. BTW, please no posting of ebay auctions as the basis of your posts in this main forum, dont want to open it up to shills posting their own auctions! 