VINTAGE RUSSIAN SLIDE RULE 25 cm, in Original Case

Offered you this very attractive vintage USSR logarithmic slide rule calculator. Complete with two part trademarked hardboard case. The slide rule and the case are both marked with the producer trade-mark. Made by Leningrad drawing factory in 1962, model 5161-57. Made of wood with plastic layer and with clear aluminium framed cursor. Size: 250 mm. See photos for condition. Scarce and highly collectible item.