Angle/Time Calculators
John Wolff's Web Museum - Slide Adding Machines
File:Addiator Duplex-Addition side.jpg - Wikimedia Commons
Duplex-size - Addiator - MechaniCalculator
John Wolff's Web Museum - Slide Adding Machines
ADDIATOR DUPLEX German Calculator in Case Pen - Etsy
John Wolff's Web Museum - Slide Adding Machines
ADDIATOR DUPLEX antique calculator in case instructions Germany | eBay
ADDIATOR DUPLEX German Calculator in Case Pen - Etsy
Addiator Duplex | National Museum of American History
TCoCD: Addiator Duplex
Addiator
GoneVintage.com
File:Addiator DUPLEX calculator.jpg - Wikimedia Commons
ADDIATOR DUPLEX German Calculator in Case Pen - Etsy
John Wolff's Web Museum - Slide Adding Machines
Addiator
Addiator Duplex calculator - MAAS Collection
Addiator Duplex Addition Subtraction Manual Pocket Vintage Calculator F30 | eBay
John Wolff's Web Museum - Slide Adding Machines
John Wolff's Web Museum - Slide Adding Machines
Addiator Duplex Sterling - Addiator - MechaniCalculator
Addiator Duplex Addition Subtraction Manual Pocket Vintage Calculator F30 | eBay
Addiator Duplex Addition Subtraction Manual Pocket Vintage Calculator F30 | eBay
