Vintage 1959 Pickett N4-ES Vector-Type Log Log Dual-Base Speed Slide Rule + Case

1959 Pickett Model N4-ES Slide Rule Vector-Type Log Dual-Base Speed Rule W/ Case

Pickett Slide Rule Dual Base Speed Metal Mod N4-ES LOG LOG Leather Case Vtg 1959

Pickett Model N4-ES Slide/Speed Rule Vector-Type Log Dual-Base Leather Case

1959 Pickett Model N4-ES Slide Rule Vector-Type Log Dual-Base Speed Ruler

Pickett Model N4-T Slide Rule 1959 Vector-Type Log Dual-Base Speed Rule W/ Case

Pickett N4-ES Vector Type Log Log Dual Base Speed Slide Rule w Leather Case

1959 Pickett Model N4-ES Slide Rule Vector-Type Log Dual-Base Speed Ruler Yellow