Jon Delorey:
K&E Deci-Lon Sliderule
Jon Delorey:
Harris Slide Rule
Jon Delorey:
American Blueprint Military Slide Rule
Jon Delorey:
Smith Chart Slide Rule
Jon Delorey:
Antenna Calculator
Jon Delorey:
Antenna Calculator reverse side
Jon Delorey:
American Blueprint Co. Military Slide Rule
Jon Delorey:
Mannheim Pocket Acu-Math No. 12 Backside
Jon Delorey:
Mannheim Pocket Acu-Math No. 12
Jon Delorey:
Abacus
Jon Delorey:
K&E Deci-Lon Sliderule
Jon Delorey:
K&E Deci-Lon Sliderule
Jon Delorey:
K&E Deci-Lon Sliderule
Jon Delorey:
Back of Military Slide Rule
Jon Delorey:
Radio Range Calculator
Jon Delorey:
K&E Dec-Lon Slide Rule
Jon Delorey:
K&E Deci-Lon Slide Rule
Jon Delorey:
LOS Coverage Chart
Jon Delorey:
Nav Aid Calculator
Jon Delorey:
Sterling Slide Rule
Jon Delorey:
K&E Slide Rule
Jon Delorey:
Sterling Plastic Slide Rule
Jon Delorey:
K&E Slide Rule
Jon Delorey:
Resonance Slide Rule
Jon Delorey:
Resonance Slide Rule
Jon Delorey:
VSWR Nomograph Backside
Jon Delorey:
VSWR Nomograph
Jon Delorey:
Waveguide Calculator
Jon Delorey:
Wavguide Calculator reverse side
Jon Delorey:
Sharp Zaurus SL-5500
