I don't have the above mentioned book, but this is how it has been explained to me (not a testament of truth, just what I’ve been told):
92 - Original Variant (Frame mounted safety).
92S - Slide mounted safety & trigger guard mounted mag catch (92S - version 1).
92SB - Ambidextrous slide mounted safety (version 2 but I prefer "
Both sides").
92SB-C -
Compact model or version 3).
92SB-D & 92SB-E - Prototypes for U.S. military testing (Versions 4 & 5).
92SB-F - Model adopted by U.S. military (version 6, "SB" dropped for civilian marketing reasons).
92FS (Slide catch safety added to protect the endangered seal population (version 7?).
There was also a 92SB-C-M and a FG (or GF?) in there somewhere but I'm not sure where they fit in the order of things. It doesn't really matter because some marketing company got a hold of them and they've started renaming their guns after cats and folk heroes. But, it was fun while it lasted.
I'm personally looking for a 92SB-FG-C TYPE M with "R" select fire. If anyone knows where to find one, please let me know
.