Can some one tell me if there is any real difference between Acrylic and Saphire as i am looking at a 1986 case size 36mm but dont have serial number yet and am worried that one style of crystal is better than the other ? And resale and future value is worse ? I am looking to pay $ around 3650 or £ 2180 ? The watch is a 1 owner and being sold in UK on behalf of a client known to them..... Comments appreciated and can i ask the vendor for a part serial number to check this if so what should i ask for as i dont think they will give me the full #
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