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 Rule W/ Case

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

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

Pickett Model N4-ES Vector Type Dual Base Speed Rule with Leather Case

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

VTG Pickett Model N4-ES Vector-Type Log Log Dual-Base Speed slide rule with case

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