Reply by MrRon

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Posted on Drafting/Design tools, using - collecting

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4797 posts in 3271 days

#1 posted 09-27-2015 04:48 PM

One of these?

I still kinda remember how to use them.
This slide rule was part of the auction item that also included the post scales.

- CampD

Yes! Exactly the same; a log log duplex decitrig.

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