I googled and couldn't find any information about the 875. My experience with Jacobsen is thus: I was employed with Ford Tractor Division from '72 until they downsized (and eventually sold to New Holland). Ford had their top of the line lawn and garden tractors (not the cheaper lawn tractors) made for them by Jacobsen. Very tough machines they were.
I assume that your unit is a compact tractor or mower. Assuming that the company hasn't allowed the cost accountants to cut corners, that should be a great workhorse.
I have no idea whether MF had a hand in the manufacturing or not.
A big welcome to TBN.