Hi. I was reading your post from... about 20 years ago, wondering about Serial numbers on Amiga 1000's. From what I know, the very first Amiga build was the XM1, and the first one was Dave Needle's #1 and it's serial number is XM1000001
I also have an Amiga 1000 from Nov 1985, and it was the very first one that I could get, and it is serial number XM1000066