Vintage Piper Flight Computer PC-3 Aviation Slide Rule Pilot E6B Style Mexico

Faber Castell 2/83 N NOVO DUPLEX Slide Rule VTG Excellent Very RARE Collectible

Vintage Pickett Model N1010-ES TRIG Slide Rule in Yellow w/Black Leather Case

VINTAGE KEUFFEL & ESSER (K&E) 4081-3 Slide Rule Log Log Duplex Decitrig & Case

Concise ruler 28N English Version Circular slide rule made in Japan

Vintage Pickett 4‑T Vector Log‑Log Slide Rule – Early White Aluminum – USA

Geotec Sun Hemmi 341-3526 Bamboo Slide Rule Japan w Case Vintage Math Tool

SUN HEMMI No. 255 SLIDE RULE RULER W/CASE