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
Amazon.com: Samsung Galaxy Watch (46mm) Silver (Bluetooth), SM-R800 – International Version -No Warranty
Wireless Charger Charging Dock Fit for Samsung Galaxy Watch 42mm 46mm, Replacement Charging Cradle Stand Fit for Samsung Galaxy Smart Watch SM-R800 SM-R805 SM-R810 SM-R815 - Walmart.com