HP48S/G Manufacturing / Variant History - Comments?

[HAL9000]

(01-18-2014 01:20 PM)TomC Wrote:  As you may know, 'megarat' has done a fine job of maintaining a list of HP48 (S and G series) machines and the manufacturing timing, detailing OS version variation:

I do know how to contact Megarat, but maybe of interest to him, I have two HP48GX calculators that are not in his list. Both are made in Singapore: 1) serial number 3327S02483, ROM version "M" and 2) serial number 3544S08544, ROM version "R".