KERSHAW #2105 rotary lock -history, etc.

[mackattack]

I finally identified a knife I have - Kershaw/KAI model 2105, rotary lockblade - can anyone help me with:
A. History/date of manufacture - different inlays?
B. How do you grade a knife - excellent, VG, good etc.
C. Value
Chuck
cmack518@peoplepc.com