Log Log Duplex Decitrig by Canon DSLR Challenge


25-FEB-2008	Pops

Before there was digital....

Copyright 1947 by Keuffel & Esser Co.
Patents 2,500,460 2,168,056 2,170,144, 2,285,722 2,422,649

Canon EOS 30D
2s f/14.0 at 70.0mm iso100 full exif

other sizes: small medium original auto

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Canon DSLR Challenge		01-Mar-2008 18:20
Mine, which I inhirited from my father, is in a great shape too (russian made, circa WW2). Cool shot. Sam Attal

Charlie Beck		27-Feb-2008 15:32
How did you manage to get a picture of my slide rule? :) No, wait, I'm wrong. Mine is still in the drawer, and I see that mine is fancier than yours (three LL scales, not just one). :) Nice shot, by the way.

Canon DSLR Challenge		26-Feb-2008 01:50
You win Pops!.... I dragged my slide rule out of its 40+ year hiding place and it is not as nice as yours? Mine is a F/Castell and has log and reciprocals on one side and Trig ratios on the other but no serial number and copyright 1957? ... so I must only be a 'pup' ;-) Boy does that bring back memories? ~ Regards Melbob