Where'd you find that number? I did a lot of investigating when I bought a non-PC 646 several years ago and everything I found came up 400 PC and 300 non-PC.
Both the PC and non-PC versions could be moonclip sensitive there were two different thicknesses of moonclips because of the variations in different brands of cases.
Have an opportunity to purchase a unfired non-PC version 103749 in the case with outer box. I could really use an education so I can determine if I should pick it up. Thanks