Index of K&E Catalogs
Cross Reference Index
Index of K&E Collection
Index of K&E Manuals
"The DI Scale"
Special Instruction Manual Adendum for the DI Scale
The DI scale was added back to the Log Log Duplex Trig and Decitrig (4080-3 & 4081-3) slide rules in 1953.
This new scale set was first shown in the 1954 catalog.