Short description: In Russian. Orlov, Alexander Alexandrovich. SDU-110 and SDU-138 counting machines. Moscow: Gosfinizdat, 1955. Schetno-zapisyvayushchie mashiny SDU-110 i SDU-138. In Russian /SDU-110 and SDU-138 counting machines. The image is provided for reference only. It may reflect condition of one of the available copies or only help in identifying the edition. Please feel free to contact us for a detailed description of the copies available. SKU5899584