The National Cash Register Company produced this Model 421 cash register around 1914. The register was used in a Marshall Field & Company department store. The register has three columns of keys for entering numbers, and a fourth column of function keys. The operating crank is on the right side, the cash drawer is below, and a receipt dispenser on the left side. Pop-up indicators above the keys indicate the total purchase. The register has serial number 1383236.The National Cash Register Company produced this Model 421 cash register around 1914. The register was used in a Marshall Field & Company department store. The register has three columns of keys for entering numbers, and a fourth column of function keys. The operating crank is on the right side, the cash drawer is below, and a receipt dispenser on the left side. Pop-up indicators above the keys indicate the total purchase. The register has serial number 1383236.