Just registered my SS Galaxy Watch SM-R800 that I have had for 5 years. Model and Serial in the watch matched what is on their website and the registration resolved it to
GALAXY WATCH SM-R800 latest model Unboxing and Honest Review | detailed explanations - YouTube
Spotify stuck on Galaxy watch 46mm (sm-r800) : r/GalaxyWatch
Amazon.com: Charger Compatible with Samsung Galaxy Watch 42mm/46mm, Upgraded Charging Cradle Dock for Galaxy Watch SM-R800/R810/R815 Smart Watch Charger (Not for Active), Black : Cell Phones & Accessories