Two Cylinder Websites:
srstractor.com
Spiegelberg Restoration and Service Antique Tractor Repair John Deere
Complete John Deere, Ford, Farmall, Massey, Oliver, Allis Chalmers Antique Tractor Restoration. Tractor service / restoration and tractor parts for most makes of tractors....
johnnypopper.com
Johnnypopper.com, Rummy's antique 2 cylinder John Deere tractor page
JohnnyPopper.com, the antique John Deere Page, featuring the classic 2-cylinder tractors, with photos, model data, links, and a very active discussion board.