JoeJac
I see tricky just beat me to it, but I will post this anyway.
Confirmed. The D1X has the meter connection prong to allow metering with AI lenses.
This linkage is not fitted to D100, D50, D70 or D80 but as you have discovered is fitted to the D200.
I will take a pic of the F3 and D2X mount tomorrow so you know what you are looking at.
Don