Vin deciphering help

Its my first Benz, im a noob. Seeking somebody with more knowledge. So far what ive found is a total of 1241 of these built, if thats true, ive got a rare car. vin #. 114.060 12 116399 Mfg date 01/1975

Its my first Benz, im a noob. Seeking somebody with more knowledge.
So far what ive found is a total of 1241 of these built, if thats true, ive got a rare car.
vin #. 114.060 12 116399
Mfg date 01/1975

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