Jean_LAMESCH_Sliderules_Collection_BOX_JL10

1761_COROS_SOYUZ_291_Magnifier

1761_COROS_SOYUZ_291_Magnifier

Russian wooden simplex normal length model 291 sliderule from SOYUZ (see text in well), with a beautiful magnifier cursor. Slider can be flipped for trig. functions. Made in Leningrad, age probably ~1934.