The 630 was built in 1958, 1959 and 1960. The 2 cylinder engine has a displacement of 303 cubic inches and produced 45 hp. It replaced the 620 and was the last model before the new generation tractors were born. Our 630 came from Paradise Valley in Alberta. The serial number on it is #6311963 making it a 1959 model. I believe there were only 560 of this model built.