For sale is a Samsung Galaxy Watch finished in black on stainless steel. This is model SM-R815U. This watch is 42mm in size and is pre-owned. It comes with a brown suede/leather strap. Both the charge cradle and cable are included.
I often get battery health inquiries compared to new. Unfortunately, there's no way to test for this. These are older watches and lithium cells do wear with age. I can say each one charges to 100% and a factory reset does not significantly decreasing battery percentage. Beyond that, I couldn't draw any other conclusions.
This watch was originally sold by AT&T and so may only be activated on AT&T's network. However, a lot of people just use Bluetooth and skip the monthly data fee altogether. Email me if you have any questions.