For sale ($360 OBRO) I have a genuine Omega stainless steel micro adjustable size clasp, reference STZ00154 / 117STZ001154 with a pair of endlinks (118ST1589). This 6 position / click clasp is the model factory fitted to the SM300 on its bracelet. The clasp is in good conditions as shown and can be used in many Omega bracelets to adjust bracelet size on the fly, similar to the Glydelock feature find on the Rolex Submariner and Sea Dweller models. On the Omega Seamaster Professional Ceramic (SMPc) 20 MM bracelet, reference 1515/816 the clasp by itself can be retrofitted; on many other Omega Speedmaster 20 MM bracelets, as well as on the 1610/930 Omega Seamaster (Speedmaster styled) bracelet it can be retrofitted with the included endlinks.

These threads provides some examples on Omega models where people has successfully retrofitted the adjustable clasps:

https://forums.watchuseek.com/f20/wh...609002-28.html
Omega Adjustable Clasp(s)
https://forums.watchuseek.com/f20/it...t-4917447.html
https://omegaforums.net/threads/micr...g-clasp.37817/


The current MSRP cost of just the clasp is $320 plus tax; the endlinks are about $60 each (if you find a friendly Omega Boutique that will order one for you; Omega had recently increased their pricing on the adjustable clasps and are less friendly into allowing people to order parts of a bracelet for a watch retrofit) so here is your chance to buy the set for less.

Price includes shipping anywhere in the USA through USPS mail, payment by Paypal. I have several positive transactions here and over 150 on Watchuseek (WUS), as well as a few more at The Rolex Forums (TRF), and "The Good Guys", so feel free to check them out. Also 100% positive feedback in over 1,350 transactions on Ebay under the same user name. Additional references available upon request. For any questions (or a HD video) please PM me or text me at 787-248-6267. Thanks for looking!