Here's a few vintage Scovill denim/workwear button cards that I picked up a few years back.
Founded in 1802 in Waterbury, Connecticut, Scovill is one of the country's old operating companies.
Along with denim and workwear, the Scovill mark can be found on military garments dating back to the War of 1812. To read more on Scovill's history click here. The company's site can be found here.