I indulged my curiosity with a couple of questions to Bruce, not that the answers were that important now he had the amp.
The missing serial number is something of a mystery to this day, though.
Bruce's response was plenty encouraging though - see part 30.
That's great news! I guess my packaging survived OK.
Now you've seen it, do you have any idea what the serial number was originally (assuming you haven't actually found it after all my searching proved unsuccessful)?
Also I'm more than curious to know what repair Adrian did to the reverb?