Faded red cardboard sleeve, about eight inches long.
A very low cost sliderule, to be picked up for the modest amount of 25 cents at Woolworths or so. Currently available online at less modest yet still not excessive cost. Judging from online sightings, these sold well in the US as well as in Britain. (Could actually be Woolworths then :)
Made by Lawrence Engineering Services in Indiana. The company was making these in Wabash from about 1935 to 1938 when it moved to nearby Peru. Simple printed scales on wood with A [B CI C] D and no scales on the back of the slide. Type 8B is the 'B' version of their 8 inch sliderule. The 'A' is identical except that didn't have the reciprocal CI scale. The cursor or runner is celluloid in a stamped metal frame.
On the back there are very compact instructions on how to use the sliderule - very condensed small print. An amazing amount of correct information in a small space there!
After some cleaning and a very little talcum, it works fine and is still absolutely straight. For such a low cost item, it survived very well :)