The 92SB appears to be an earlier version of the 92FS. Upgrades between 92SB and 92FS appear to be:
"a combat triggerguard to allow a more functional rest of the index finger when shooting with two hands, matte black finish named "Bruniton," chromium plated barrel and barrel chamber, a new shape of the grip, new grips, and a slide over travel stop."
Source:
www.geocities.com/Yosemite/6078/92story.htmViper Out