I know it was a first generation Apple Watch you posted, but you (incorrectly) identified it as a Series 1 in your post.
But you said this below: Which we already know the first Gen has the serial number attached on the outer portion, its not a Series 1 in the picture, its a _First_ Gen Apple Watch pictured. I think you’re confused slightly.
is a first generation Apple Watch, not a Series 1. From Series 1 through present, the serial number is in the band slot. Reference:https://support.apple.com/en-us/HT204520