Gear S3 Frontier vs Galaxy Watch3 - Technically it's a marginally thinner but smaller housing, narrower bezels, and weighs significantly less. It feels thinner than it looks, maybe due to the back
Amazon.com: GinCoband 22mm Bands Compatible with Galaxy Watch 3 45mm/Galaxy Watch 46mm/Gear S3 Frontier/Gear S3 Classic Men Women (Army Green, 22mm) : Cell Phones & Accessories
Amazon.com: for Samsung Galaxy Gear S3 Frontier SM-R760/ Gear S3 Classic SM-R770 Battery Replacement, EB-BR760ABE GH43-04699A Battery for BR760 R765 with Repair Tool Parts + Installation Instruction : Cell Phones & Accessories
Gear S3 frontier | SM-R760NDAAXFA | Samsung Business Africa
Samsung SM-R765T Gear S3 frontier (T-Mobile) Smart Watch for sale online | eBay