I have three F-122's: 6110345, 6110668 and 1385151. And I've seen 6110347. They are almost identical with minor variations in key labels. I think 611034*'s all are essentially the same. On the other hand, 6110668 and 138515 have a set of 8 DIP switches on the bottom. I'm not really sure what they do, if anything. I left the ones on 1385151 alone and got it to work with Soarer's converter with no problem. I read somewhere that the DIP switches can be used to set the keyboard ID, but functionally they don't make any difference.