Slide rules HOME page COLLECTION 5" RULES
Make UTO, Denmark
Model 601

1. Rear of slide has a fixed clear plastic "cursor" to allow use of trigonometrical functions without need to remove slider.
2. Promotion for "W Sisson and Co Ltd, Sisson Road Gloucester"

Front view
0506-uto-601-01.jpg (12741 bytes)
Detail - left front view
0506-uto-601-02.jpg (14276 bytes)
Detail - trig scales on back of rule
0506-uto-601-03.jpg (11113 bytes)
Manufacturing date c 1960. My estimate.
Length 5"
Material Plastic
Scales K,A[B,C1,C/ S,ST,T] D,L
Gauge points p: 3.14: A,B,C,D
c : 1.13: C,D
Q: 0.01745 (sines and tans of small numbers)
Cursor Plastic
Hair lines None
Documentation Original leaflet
Condition Complete in leather pouch.