I have a bus isolator/expander unit that is a GPIB-120B.  When looking at a datasheet, I see the part numbers in the ordering information being:
 
779651-01 for US (120 VAC)
779651-04 for Universal Euro (240 VAC)
779651-06 for UK (240 VAC)
779651-07 for Japan (100 VAC)
 
However, my part number is 192714E-01L.  Is there any way to tell which of those versions I have based off of my part number?