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

Gilson Circular Midget Slide Rule 1931 1936 Calculator Disk 4 1/4" w/ Book!

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

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

1960s Pickett Model 4-ES Slide Rule Vector-Type Log Dual-Base Rule With Case

Vintage Pickett Student Slide Rule w/Case and Instructions, Apollo Edition