There is a check digit calculation which is compulsory in the US. The way the system works is that in order to validate a vehicle identification number through the vehicle identification number check digit, either the buyer removes the check digit or multiplies it with zero.
Grafton is a town in Worcester County, Massachusetts, United States. The population, indicated by the 2014 town records is 14, 268, in nearly 5,700 households. Incorporated in 1735, Grafton is the home of a Nipmuc village known as Hassanamisco Reservation, the Willard House and Clock Museum, Community Harvest Project, and the Tufts University Cummings School of Veterinary Medicine.
North Grafton is the home of the Wyman Gordon Company. In 1955, the United States Air Force installed a 50,000-ton metal forge in North Grafton as part of its Heavy Press Program in a plant operated by Wyman Gordon. It was the largest metal forge, and indeed the largest machine, in the world at the time it was built.