I wish I could find an old price order list for your version R60 for I could tell you the minimum equipment you have. There was as many as 7 versions on a certain model combine. The more popular the machine is for the time the more version numbers that would be available. If there was 7 versions for a certain model and the last digit of the version number was 1 it would be a most basic machine. If it had a 7 it would be most loaded machine with all the bells and wistles. There were years when there was just 2 versions for a certain model and the one would likely have corn varible for corn areas and the other a single speed header drive for it never runs a corn head. In the next breath if there was only two versions they could both have corn varible for the only area it will sell is in corn belt. The next thing to keep in mind is the closer you get to the largest model the more things that are standard. So I guess I never pay much attention to version number for I just look to see it has the options we need for our area. We would insist on tailings return kit to cylinder and chopper where the corn guys would insist on the varible corn head drive. With the R60 being likely the most popular model for its time there would of been 6 or 7 versions and with yours being a 5 I would be sure it is loaded up good for corn and soybeans. It may not of had straw chopper or tailings return to cylinder but could of well been added to purchase order or added later. I think they come with version numbers to try make it more easy for a dealer or custumer to know what all combine had for options at a glance but don't think it worked out quite that way. A salesman in a given year would likely quickly recall what all a certain version would have for equipment but still have to look at machine or invoice to see what else it may have. Is that about as clear as mud or whatIJ Have a good day.