While we're waiting for the experts to arrive, I'll give my opinion; it's a mid to late 1980's stainless steel Model #14 with, as Miles suggested, a sawtooth/no saw tooth blade grind...(the same blade grind would be used on a no saw tooth (NST) Model #18)...

The giveaway here is the FL blade stamp, first used in 1984 - and, the end production date for JRB 'C' model sheaths, roughly 1989...

Hope that helps,
_________________________
If all else fails, punt...