Kenworth Truck Company is celebrating its milestone 90th anniversary during 2013. It all began in 1923 when Harry W. Kent and Edgar K. Worthington incorporated the Gersix Motor Company as “Kenworth."  The company name was formed from a combination of letters from the founders’ last names.
That first year, the small Seattle truck manufacturer produced 78 six-cylinder, gasoline-powered trucks. Since then, Kenworth has produced more than 900,000 trucks.