If it has 6 studs/lug nuts, most likely is of later variety.
One tell tale indicator, would be to identify the number of studs of the front wheel/hub assembly. Given the serial number '63794', could be a 1979 vintage IF it was/is a gear shift model. Given the serial number '63794', could be a 1991 vintage IF it was/is a HST model. One of the key elements in determining what year it was manufactured, is whether it is a gear shift or hydrostatic tranny. Tractortipsdotcom says that it should be a 1991. What is the best way to find out the actual year of manufacture? i think it is a 1991 model but am not sure.
I recently purchased a Kubota B7100 with the serial number 63794.
