Ok, so I searched and wasn't able to find anything, so I thought I'd ask directly.
The best I can figure is:
product code 0539343 is Euro1 ME and gives f/w 3.0649.0.0.31
product code 0539351 is Thailand ME? and f/w 3.0649.0.0.31
product code 0543843 is HK ME? and gives f/w 3.0638.0.0.30...