I have access to a 610 local here but says its 1960? my research shows 610 started in 1972? Its a Clark Bobcat 610.. not 610m. Good shape except 4 cylinder Wisconsin has low compression. wants $1500. Im bit leary of the variable speed belt clutch.. works now but if fails I heard impossible to find one to replace it. any info appreciated. should add.. just looking for skid steer to play with. No real heavy work. Use on my little 3 acre farm place to move gravel or dirt once in awhile.