This Pierce-Arrow Model 66 got its name from the rated horsepower output of the engine which was calculated from the bore and cylinder number. The cylinder blocks were cast-in-pairs. This model was born in 1910 when Pierce enlarged their flagship model to include a 825 cubic-inch version of their 6-cylinder engine and one of the largest fitted to a motorcar in the Nickel-era. The car rides on a 140-inch wheelbase and is fitted with a 4-speed transmission. It was also one of the most expensive vehicles at around $7,200 U.S. It was billed during this period as 'The best car that money can buy!'
This example is the earliest 66 horsepower model known to exist and is one of approximately only 100 produced each year until 1917.