Re: Concise Circular No 28

Ian Lodge
 

I ave two Concise No 28 circular slide rules. Both have the conversion table on the back. I also have a 96mm Concise No 320, which has the same table on the back. The tables giving details of Concise models in the three manuals that I have all state that the 28 and the 320 have conversion tables on the back.

Ian

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