The Simplicity Sovereign 3415S is a 1972 garden tractor from the Sovereign Series, built in Port Washington, Wisconsin, USA. It features a 15 hp Briggs & Stratton 531cc 1-cylinder gasoline engine with electric start and a 3-gallon fuel tank. The transmission is a 4-speed shuttle type with 4 forward and reverse gears. It has two-wheel drive, manual steering, and an open operator station. The tractor includes a mid PTO with an independent clutch using a mechanical idler pulley. Dimensions include a 48-inch wheelbase, 67-inch length, 36-inch width, and 39.25-inch height. Tires are 16x6.50-8 front and 23x10.50-12 rear. Electrical system is 12 volts with negative ground. Attachments available include 42" and 48" mid-mount mower decks, snowblowers, and blades. Variants include the 3415S shuttle and 3415H hydrostatic models.