SINCO "Roto Rule" "a revolutionary new slide rule!" ROTOTRIG "100" No. 250 3" diameter. Dated 1962 & complete in box with paperwork & protective case.
The top of the box has black spots & some dings along the edges.
The brown soft plastic case has some light soiling but no tears.
The instruction manual and warranty card/owner's certificate are both folded with no tears, soiling or writing.
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Location: Box SH1