Except that I live in Thailand and the closest AD/boutique is in Bangkok, a one-hour flight away from me. Even then, I’ve been told I would have to buy the entire clasp assembly, which seems a bit much in order to get the one tiny screw. But maybe that’s just the way it is. I continue my investigation.
Here is the screw information... 107ST3386 | SCREW M1.40 ØH2.0 L3.25 STEEL Call the closest AD, Boutique, or Service Center, and ask them to order one (or several) and ship it to you.
Someone at the OB said that screw part number was not for my watch which caused some delay. I bought two screws and had them shipped anyway. PERFECT! Many, many thanks.