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
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
For Samsung Galaxy Watch 46mm SM-R800/ R805 Nylon Canvas Fabric Sport Band Strap | eBay
SM-R800 | SM-R800NZSATGY | HK_EN
LCD Screen and Digitizer Full Assembly for Samsung Galaxy Watch 46mm SM-R800