Vince
If you got it Nov 98, I'm not 100% sure if the actual build date would put yours in the "fiber optics" system.
Easy way to tell is that the radios with the Fiber Optics system have the telephone key pad built into the right side of the radio faceplate, and use the phone keypad numbers for the radio presets. The older radio has the 1 through 6 numbers under the radio display panel that are the preset keys., and have the "tune" and "seek" bars on the lower right corner with the "SC" (scan) button in the middle of the bars.

Gilly