Hi Instow,

Here's the serial number info I'm *fairly* sure is correct:

Your Lisa's serial number begins with a 'B', meaning it was once a Lisa 1 that was at some point upgraded to a 2.

It was manufactured mid-1983 (I can't quite remember what the '125' in the manufactured code means... perhaps the day?)

I believe AppleNet numbers are sequential for each Lisa product line (1 and 2), with the first Lisa presumably having the code 00100000 or 00100001. Yours would be the 2478th Lisa 1 produced.

Hope this helps! I'll see if I can dig up more info on this for you, as I have some Lisas I have to get more info on as well.

- fri0701