No�«l,
I don't want to divert Gerben's thread, but I have a K&E "Log Log Duplex Decitrig" that my Dad bought for me when I entered college in 1957. It was a pretty expensive outlay for him at the time and I treasure it to this day. "The Dreaded Cursor Bar Rot" is not in evidence on my slide rule as it is as clear as the day he gave it to me. I still have the original K&E green leather case that I carried it around in on a swivel belt loop. Guess I was a prototypical "nerd". Both the rule and the case are in near mint condition and I display them, along with my 6" Faber Castell pocket slide rule and case and my abacus, in my study. I have the original manual for the K&E around someplace, but it would take an extensive search to find it.
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If it's made after 1918...it's a reproduction
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