PayMaster check writer, commonly known also as a check protector or check embosser. Series S-600. Used in offices during mid 20th century to print and shred specific dollar and cents amounts onto paper checks to prevent forgery and alterations. Features vertical sliding metal levers labeled under DOLLAR and CENTS columns, a side-mounted crank handle, and gold-toned metal housing. Ink roller under door on front. From Chicago, Illinois, Patent No. 2,697,981, Serial 8A27571, 14.5 pounds.