Vintage Soviet Logarithmic Engineer Student Slide Rule Ruler

Vintage Slide Rule Lot – Keuffel & Esser, USSR 1971, Engineering No Cursors

VINTAGE Mini Logarithmic RULER Soviet Slide Rule 1971 With Case USSR Calculator

Vintage 1986 year Soviet Slide Ruler Logarithmic USSR in Original Case

Vintage Soviet Logarithmic Engineer Student Slide Rule Ruler USSR MADE GOOD

Antique Keuffel & Esser Thacher Cylindrical Slide Rule Engineering Calculator

Vintage 1986 Soviet Logarithmic Engineer Student Slide Rule Ruler

Vintage Soviet Logarithmic Engineer Circular Slide Lineup Rule Ruler KL-1