SeiyaJapan.com - Seiko Announced the successor of SBDX017 (MM300). The model was SBDX023. 320000 Yen (about 3000 USD) Nov/2018 released. ** The Crystal was changed to sapphire from hardlex. ** The strap
![Amazon.com: CRAFTER BLUE CB03 Curved End Watch Band Rubber Strap Replacement for Seiko MM300 MarineMaster SBDX001, SBDX003, SBDX005, SBDX017, SBDX021(SLA019J1), SBDX025, SBDX023, SLA023J1(SLA021J1) etc - Black : Clothing, Shoes & Jewelry Amazon.com: CRAFTER BLUE CB03 Curved End Watch Band Rubber Strap Replacement for Seiko MM300 MarineMaster SBDX001, SBDX003, SBDX005, SBDX017, SBDX021(SLA019J1), SBDX025, SBDX023, SLA023J1(SLA021J1) etc - Black : Clothing, Shoes & Jewelry](https://m.media-amazon.com/images/I/51umK-3YAOL._AC_UF1000,1000_QL80_.jpg)
Amazon.com: CRAFTER BLUE CB03 Curved End Watch Band Rubber Strap Replacement for Seiko MM300 MarineMaster SBDX001, SBDX003, SBDX005, SBDX017, SBDX021(SLA019J1), SBDX025, SBDX023, SLA023J1(SLA021J1) etc - Black : Clothing, Shoes & Jewelry
![Battles of the Marinemasters, Chapter 3 - quick shot - Seiko SBDX001 vs SBDX017 vs Merkur vs SBDX023 - YouTube Battles of the Marinemasters, Chapter 3 - quick shot - Seiko SBDX001 vs SBDX017 vs Merkur vs SBDX023 - YouTube](https://i.ytimg.com/vi/dRHuGj3e_k4/maxresdefault.jpg)
Battles of the Marinemasters, Chapter 3 - quick shot - Seiko SBDX001 vs SBDX017 vs Merkur vs SBDX023 - YouTube
![Seiko Prospex SBDX023 Discontinued Date Sapphire crystal Automatic Mens Watch - Japan Pre-owned Vintage Seiko Prospex SBDX023 Discontinued Date Sapphire crystal Automatic Mens Watch - Japan Pre-owned Vintage](https://cdn11.bigcommerce.com/s-2iwxhck5m7/images/stencil/1280x1280/products/108271/565398/m51034548242_1__14095.1673162399.jpg?c=2)