On 07 Feb 2016 12:05:03 -0800, you wrote:
My new 7854 has a Guernsey S/N, something like 1....00175, I think (I'm not where the instrument is ATM).It has a modern "Panaflo" tubeaxial box fan like you would find in a
The change notice that I have says the fan was changed starting with
B090000 which is before the RAM and ROM cards were combined starting
with serial number B100000.