That looks exactly like the cluster on my '81 300TD. That was the only year they used the electronic speedometer on the U.S. spec wagon with the 722.303 transmission. Same as was used on the SDs of that period.

You can actually read the date stamped on the back of the speedo.

__________________
1981 300TD 310k miles
1970 280sel 172k miles
1966 230 Fintail 162k miles

"Where are we going? And why am I in this hand basket?"