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 2019 (46mm) Bluetooth, Wi-Fi, GPS Smartwatch, SM-R800 - International Version (Silver) : Electronics
Silver Samsung Galaxy Watch - 46mm Bluetooth | Samsung US
Samsung+Galaxy+Watch+SM-R800+46mm+Silver+Case+Classic+Buckle+Onyx+Black+-+Bluetooth for sale online | eBay
Compatible Samsung Galaxy Watch 46mm Case 2018 ( for SM-R805 and SM-R800 and Gear S3 Frontier SM-R760 ) , (2 Packs) Soft TPU Smart Shockproof Case Cover Bumper Protector(Clear+Gold) - Walmart.com