I am not trying to rain on anyone’s parade but there might be an issue with the watch. See article below.
It’s not clear if the faulty engines were shipped out or not. The article just said that Apple scrapped some of them. For those of you that got the first batch of the A watch, you might want to check with Apple to see if you got the Japanese version to be sure it does not fail on you prematurely.
HTH and good luck.