Slide rule Janus series
Maker
Blundell Rules Limited
Datec 1955
Object number00027327
NameSlide rule
MediumPlastic, metal
DimensionsOverall: 61 x 330 x 10 mm, 0.2 kg
ClassificationsTools and equipment
Credit LineANMM Collection Gift from Captain D White
1940s-1980s
1940-2000
Porpoise Breathing Appliance Company
1953