vintage speedometer in box...need help
 

I have a speedometer, Ford number c9tz-17255-C. I cant find what year it fits. I know its a hard to find item. Need a year and maybe a value. I can add pics if needed. Got it from my father whos a retired mechanic. It still in the original FORD box. thanks for your help.

HoW about a picture

69 truck, pic would help with series..

How do You know that it is a hard to find item, if You don't know what the part's application is ?

I have a $#!t ton of parts , both NOS and aftermarket from the late 40's to the mid 70's that I would love to think are worth a ton of cash. Truth is.....it's subjective. One Man's trash is another Man's treasure. Against My Wife's belief that I am a Part's hoarder....I have have amassed everything from retainers to fenders to rims,etc......"it's all about the nuts and bolts"!