964 C4 Speedometer

[nine11speedster]

I m trying to find a replacement speedometer for my 964 C4. I wonder if all the 964 speedometers are interchangeable (apart from the tiptronic speedo).

Can i use different years?
Can i use C2's speedo?

Thanks
Carson

[RSTarga]

Only 2 part #s one for pre 90 and one for 90 and on. So they should be interchangeable.

[nine11speedster]

Thank you!
One more question ; are 993 and 964 Speedometer interchangeable? (do they have the same part number)?