That 880 is a 1960 model. The number 872 is your transmission code, which is the regular speed helical transmission without Power Booster drive. The other number is your specification number, the first two digits, 48 tells us that is a 'second generation' 880, that is one with the helical transmission. The numbers 18 and 28 were assigned to Super 88s, and 38 and 48 were for 880s. The rest of the numbers code for the other options on the tractor, including the wheel sizes. Wish I could tell you what yours mean, but I haven't figured all of those out yet.

I need to get all the serial numbers posted to the site, but have neglected it so far. Your can find all sorts of Oliver serial numbers at <!-- w --><a class="postlink" href="http://www.ytmag.com">www.ytmag.com</a><!-- w --> and <!-- w --><a class="postlink" href="http://www.oliverinformation.com">www.oliverinformation.com</a><!-- w -->  You can also find a very good listing of serial numbers in the book [i:3qsry397]A Guide to Hart-Parr Oliver and White Tractors[/i:3qsry397] by Larry Gay, plus lots of information about each model.