[mothered]

The precise weight of the watch box was 213 grams (I weighed it when I got the package).

It's a little too heavy for the EB/missing Item method, which Is why It was detected as stated In their message.

I thought Amazon measure the weight at their warehouse and the carrier do too, so they crosscheck the carrier's weight to see if it matches. Is this how it works?

Correct.

But they cannot confirm the weight at the time the package was delivered to your address. If you didn't mention the package wasn't tampered with, the watch was stolen after It was weighed at the depot.

Also, just wanted to say a big fucking thank you man; I've seen you on this forum and you are so helpful, I really mean it.

Thank you.

You're most welcome.