Just about to turn 100!  This 1925 slide rule has its original leather case and is in EXCELLENT condition.  Many of these of this age are missing the sliding, glass cursor, but it's here!  Only thing is it looks like part of that old, 1920s type of acetate plastic has broken off of the bottom/underside of the cursor where it grips the ruler.  But, since it's in the middle of the plastic strip, the cursor still grips as it's supposed to.