Style: 6 Pack non-OEM new build Red/black ribbon for universal calculator spool c-wind (alternative for Unisys 19-2076-891). brand is recognized in the industry for its superior performance and uncompromising attention to detail. An industry staple, has more than 40 years of technical experience and is a well-respected printer manufacturer. ' comprehensive product line of compatible printing ribbons is available at a fraction of the cost of OEM products.