White was, next to Singer, perhaps the largest and best known of the US . FR serial numbers were used on badge machines as well as those labeled "White".
ISMACS Singer Serial Number lookup. Look up your Singer Sewing Machine Serial Number to find out when your machine was made and identify what model you have. Antique and Rare Sewing Machines Sewing Machine Research . Weir · Wheeler & Wilson · Whight and Mann · White · Willcox & Gibbs · Vulcan.
Why do Singer Sewing Machines have Serial Numbers? Over years old is considered an antique, and younger than that is 'vintage'.