#20037597 inside window handles with black knobs

[Northernforce]

I know most came with clear knobs and are expensive to find NOS  but what would a set of NOS black knob handles fit and be worth? Thanks in advance!
Keep on Cruising!
Dave

[firstgenaddict]

If they are the 3 step knobs outside rim and black they are from a 68 model year. 68 GM's had color keyed window crank knobs, door lock knobs, and vent window crank knobs.