The Simplicity Serf 515 is a 1968 lawn tractor from the Serf Series by Simplicity, a part of Allis Chalmers. It features a 5 hp Briggs & Stratton 206cc 1-cylinder gasoline engine, a 2-speed belt-driven gear transmission with 2 forward and 1 reverse gears, and two-wheel drive with manual steering. The tractor has an open operator station and weighs 257 lbs (116 kg). It rides on 4.00x6 front tires and 4.80/4.00x8 rear tires. Attachments include a 28" mid-mount mower deck and a 42" front-mount blade. The original price was $313 in 1968.