Used vintage Buckle only.  Very scarce wider size.  This 18mm is slightly wider than the 16mm standard.  Associated with 20mm GMT 1675 and Submariner straps that sometimes tapered to a wider 18mm size.  Solid 18k yellow GOLD; marked: 750 ROLEXSA* SWISS.  Classic early Authentic, original.  Very little sign of use or any distraction.  This vintage original buckle has been polished and brought up to mint original condition.  Like new. THIS IS A FINE COLLECTIBLE. DON'T INVEST IN THE STOCK MARKET. BUY SOMETHING PROVEN IN TIME. 

NOTE: We have been selling vintage watches on E-Bay since 1998 as watchco1973 with over 15,000 vintage watch sales and 100% positive feedbacks. You can buy from us with confidence. 

OTHER NICE FEATURES: Free U.S. Shipping.  $58.00 Fedex overseas. 

* The term ROLEXSA is not a standard corporate abbreviation, but rather a misinterpretation of Rolex SA, which stands for Rolex Société Anonyme. It is the official name of the Swiss luxury watch company. 

Here is a breakdown of the term:

Therefore, ROLEXSA means Rolex Incorporated.