Compare these Features of the 627:

"Soft Action" brake-clutch combination 

3 speeds forward and one reverse, with speeds ranging from1 mph to 4 mph 

Deluxe deep foam seat mounted on rubber 

All-gear transmission with Controlled Traction providing torque to both wheels when one wheel slips, yet retains differential action when turning 

Controls conveniently located on the dash for safety 

20" turning radius to help you trim close

Electrically welded heavy-gauge steel frame

Pneumatic tires, 4.10/3.50 x 6 in front, and 16-6.50 x 8 in rear

Electric starting kit--12 volt battery type fully self-contained on tractor.

Simplicity Yeoman 627. 

Shown with 32" Rotary Mower, mounted on the front axle to tilt with front wheels and avoid scalping. Mows 1.2 acres per hour, with adjustable height from 1½ inches to 3¼ inches. Yeoman has 7 hp Briggs & Stratton engine with "Easy-Spin" starting (electric starter optional).

Wide Choice of Attachments and Accessories: 32" Rotary Lawn Mower... Vacuum Collector... Roving Nozzle... Dump Cart... 36" Lawn Roller... 3 Gang Mower... 32" Rotary Snow Thrower... 42- Snow Plow and Dozer Blade... 40' Grader Blade... Tire Chains... Wheel Weights... Leaf Mulcher. . . Electric Starter.

[Source: Simplicity -- for picture perfect outdoor maintenance, 1969 Product Catalog, Form No. 868, courtesy of John Boesch]