Great thing for a collection of computer technology 60-80s of the USSR.The tape drive head from the Soviet \"Mid Level\" two-level information computer M-400 (Software compatibility with DEC PDP-11/40). Development of INEUM (Institute of Electronic Control Machines) of the 60s of the USSR. The machine is designed to control processes in thermal power plants.The M-400 was running a real-time operating system (OS) - an analogue of the DEC operating system RSX-11A. The head is sold complete with connecting wires and 2 connectors.The kit weighs 539 grams (1.18 lbs). The state in the photo. I combine the delivery of lots. Before buying lots, specify in advance the total cost of lots including shipping. response Policy: If you are pleased with your purchase, please leave us positive response once receiving the item, and we will return the response upon you. If you have any problem with the outcome of the transaction or product, please don\'t respond with negative response before contacting us.Contact Us: Please contact us if you have any questions about items. Worldwide shipping.Item ships within 1 business day after the receipt of the payment.The item will be shipped by registered airmail by Ukrainian Postal Service.Shipping takes 12-20 business days toEurope,USA, Canada, Australia and Japan.Post of Ukraine works despite the fighting in the east of the country! Delivery times may increase by several days due to changes in logistics routes.