How do I check to see if my Apple Watch Ultra 2 is authentic?

The box actually says designed in California, and made in the respective country of origin. The printing on that box, looks sloppy. I’m inclined to say fake. What is the exact model/part number? If the part number ends in LW/A it has the feature disabled. You need to show the screen shot of the model/part number.

My Ultra (gen 1) ends in LL/A. It’s legitimate.

Serial numbers are routinely copied, and serial numbers are fundamentally useless for detecting counterfeits, frauds, hacked devices, stolen devices, Activation Lock locked devices, blacklisted devices, and for identifying devices that get blacklisted after purchase, etc.

Read the following, and read the replies over there: The All Too Common SAD Reality of Buying … - Apple Community

That article is written for iPhone and iPad, but the same issues and limits exist with Apple Watch.

According to an Apple Service Coverage check, this Apple Watch was purchased April 2024, so it doesn’t seem like a fake serial number. It should be legit, but I’ll differ to the more experienced folks on this forum.

If you are doubting the authenticity of the device, then buy a new one directly from Apple or you can also buy one from Apple's Refurbished Store which has NO downsides. Apple Refurbs are:

• Identical to new
• Have the same warranty as new
• Are eligible for AppleCare
• Can save hundreds of $$

You can find the refurbished store by navigating to www.apple.com, scroll to the bottom of the page and click the Refurbished Store.