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

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

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

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

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

Vintage 1959 PICKETT #N4-ES SPEED SLIDE RULE Vector Type Dual Base LEATHER CASE

1949 Pickett & Eckel Slide Rule with Leather Case Model 4 Vector Hyperbolic dl

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