For your consideration, here is a Vintage Lawrence Slide Rule No. 10-B, Made of Wood, with Box.  Please note:  It is missing the slide and is for parts or the box.  The calculator has some wear on it and is fairly stiff to move.  There is a "B" marked on the edge.  The box has some wear on it and a nick in the edge.  It will be mailed in a box for protection.  Item pictured is the actual item up for sale, and comes from a non-smoking household.  (476.977x-.7bb)