31mm Double Domed Flat AR Sapphire Crystal for Seiko SEA URCHIN SNZF17 7S36-03C0 | eBay
Seiko SNZF17 Review - Sea Urchin | Automatic Watches For Men
Rob Wei no Twitter: "I managed to update my Seiko Sea Urchin with a sapphire crystal and a ceramic bezel insert from @dlw.watches without breaking anything - I feel kinda proud :D #
Seiko SNZF17K1 "Sea Urchin" Is Your Ultimate Submariner Styled Value Watch | aBlogtoWatch