Slide rules HOME page COLLECTION 5" RULES
Make Keuffel and Esser, USA
Model 4181-1

1. This a fairly comprehensive rule having three log-log and three inverse log-log scales.

Front view
0515-ke4181-1-01.jpg (20294 bytes)
Detail - front left
0515-ke4181-1-02.jpg (23803 bytes)
Detail -front right
0515-ke4181-1-03.jpg (15805 bytes)
Back view
0515-ke4181-1-04.jpg (18857 bytes)
Detail -back left
0515-ke4181-1-05.jpg (16579 bytes)
Detail - back right
0515-ke4181-1-06.jpg (17071 bytes)
Manufacturing date c 1970
Length 5"
Material Plastic
Scales LL01, L, K, A [B, T, SRT, S] D,DI, LL1
LL02, LL03, DF [CF, CIF, CI, C] D, LL3, LL2
Cursor Plastic with plastic and metal frame
Hair lines Single hair lines
Documentation None
Condition Very good