Tractor:

Model: D1450 = S373 
Year: Approx 1984
Engine: 16.5 hp
Cost: $4800 new
PTO oil seal: NOK1665E = Chicago Rawhide Seal 11610 (CR 30x42x7 CRW1 R) 
PTO dust seal: NOK AG1663F from Chicago Rawhide 11817 (30x42x6 HMSA7P2 R)