K&E, 4092-3, 1923
Serial Number or Date Stamp: 64163
|Country: USA||Primary construction material: wd||Case included?: no|
General Description: Advanced linear log-log duplex slide rule
Length of 1 decade = 10 in, and overall scale length = 10 in. The largest physical dimension is 10 in.
Front Scales: DF [ CF CIF CI C ] D L
Back Scales: LL0 A [ B S T C ] LL3 LL2 LL1
Notes: Log Log Duplex; near-last of early scale set for 4092-3, just before transition rule; laminated edges, serif fonts; initials W.G.B.
Date Acquired: 05/10/2022