For your consideration, here is a Vintage Sanderson Flight Computer Metal Calculating Device, Model SC-1, made by Sanderson Films, copyright 1963, made out of mostly plastic.  The flight computer is in nice shape and moves as it should.  It has some notes written on the left and right sides.  Please see the photo. 

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.  (624.975v-.13hc)