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

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

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

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