Vintage Pickett Eckel Slide Rule N4-ES Leather Case USA 1959 Vector Type Log Log

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 Yellow

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

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

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

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

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