finding service history of older models

[shirt]

First post in this section so hello all.

I have just bought an E28 528i. It is in excellent condition and I trust the seller, but he says the car came to him with no service history.

I know that on modern BMW's, a dealer can access the full history if the car has been BMW serviced. Will this hold true for older models?

If not, are there other methods for finding the history other than contacting the previous owners? Its not a big issue for me personally as the condition of the car speaks volumes, but I intend to sell it within the year so it would be a useful thing to have.

[shirt]

cheers for the info. have been told a previous owner has copies of the history, so a lucky break for me!