This set consists of a 1:16th Allis Chalmers D-19 Diesel tractor and disk. The diesel D-19 tractor will go down in history as the first mass produced tractor with a turbocharged engine. The D-19 was introduced in 1961 with a 262 cubic inch turbo charged engine featuring 66 horsepower along with better fuel economy vs. the gas engine counterpart. The D-19 was a five-plow tractor and was the largest AC tractor at the time it was announced. The D-19 was produced until 1964 when it was replaced by the One-Ninety series tractors.