This is a A-104842A Coupler Sprocket PN: 104842AMain Description As Following : A-104842A Coupler Sprocket P.N: 104842A Dim A (1): 14 TeethSpline Count: 27 Spline Found in Section & Models : Transmission & Rear Axle > Clutch Related Parts, White/ Oliver/ Mpl Moline TRACTOR: 1750 (SN 180537>), White/ Oliver/ Mpl Moline TRACTOR: 1755 (SN 220000>), White/ Oliver/ Mpl Moline TRACTOR: 1800 (SN 90525>), White/ Oliver/ Mpl Moline TRACTOR: 1850 (SN 150421> W/O HYDRA-POWER, OVER/UNDER, White/ Oliver/ Mpl Moline TRACTOR: 1855 (SN 220000>), White/ Oliver/ Mpl Moline TRACTOR: 1900 (SN 90525>), White/ Oliver/ Mpl Moline TRACTOR: 1950 (SN 150421> W/O Hydra-Power), White/ Oliver/ Mpl Moline TRACTOR: 1950T (SN 194080), White/ Oliver/ Mpl Moline TRACTOR: 1955 Associated Items : New Also A-FRM-OLLATE, A-OL-O-1750, A-OL-P-1750, A-OL-S-1750, A-SMO202, A-FRM-OLLATE, A-OL-O-1755, A-OL-P-1755, A-OL-S-17551855, A-SMO202, A-FRM-IHOL, A-OL-P-18001900, A-OL-S-18001900, A-SMO202, A-FRM-OLLATE, A-OL-O-1850, A-OL-P-1850, A-OL-S-18501950, A-SMO202, A-FRM-OLLATE And : Dim A (1): 14 Teeth Spline Count: 27 Spline