An exceptional piece of mid-century office engineering: a mint condition, fully working Addo-X Model 80 10-key adding machine including original green canvas cover. Manufactured in Malmö, Sweden by the highly revered AB Addo company, this unit features a 9-digit capacity and smooth mechanical operation. Finding an Addo-X in this pristine, fully functional condition is incredibly rare. This machine has been meticulously preserved and includes its highly coveted, original green canvas protective dust cover. It bears the stamped serial number L33663, making it a perfect, verifiable addition to any serious technology museum, vintage industrial office collection, or high-end film prop department. Product Details Brand: AB Addo (Malmö, Sweden) Model: Addo-X Model 80 (10-key configuration) Serial Number: L33663 Condition: Mint vintage condition. Minor aesthetic signs of age may be present, but the body, keys, and mechanics are remarkably clean. Functionality: Fully working. Smooth mechanical action on keys and levers. Capacity: 9-Digit printing/calculating capacity. Included Accessories: Original vintage green canvas dust cover. Condition Note for Buyers Please examine the high-resolution photos closely to inspect the pristine cosmetic state of this machine. It will be packed with professional-grade care, heavy bubble wrap, and structural reinforcement to safely accommodate its significant mechanical weight.