Hi Sammy and welcome here,
I do not know any vintage Breitling fitted with a sapphire crystal. All the domed crystals are acrylic , and probably some very old models can have a mineral glass crystal . Flat crystals often are in mineral glass , but flat crystals are not common on vintage Breitlings . A vintage Breitling has been issued until 1979 .
All current Breitling models have a sapphire crystal ... but consider that Breitling SA has nothing common but the name , with the previous L. Breitling company which disappeared in 1979. They refer to the historical company mainly because speaking about its "roots" is good for marketing .
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