77 300D with 68K???

[chiwanga]

I just purchased this 77 300D with the odometer showing 68K. The car was worth the money I paid, even if the miles are not accurate, so that is not a problem, however, I would love to be able to prove the miles. Unfortunately, I do not have any records for the car. I am trying to find out as much info as I can. A few of the entries in the service booklet have been stamped, and the first 2-3 are stamped by dealers in Europe, leading me to believe this might have either been a euro car, or at least an American model with factory delivery. What suggestions do you have, for getting any info?
Vin: 12313012029184
77 300D