Although more than one of these pin cushions must have made, we've been unable to find any other examples. The material is jet (which makes sense, as Scranton was a big coal producing area). When rubbed, the piece becomes electrically charged. The jet has been lathe turned, with most parts polished, but two of the grooves left unpolished. On the top ring the words: SCRANTON PA. We date this piece c.1900.
Please note: genuine jet is made from bituminous coal. Because the Scranton area produced anthracite coal, this piece may be "imitation jet". But it might take a geologist or gemologist to discern the difference.
The base diameter is 2-3/4", the height to the top of the turned jet is 1-3/4", and then the red fabric pin cushion sits on top of that. Condition is very good.There are 3 small chips and a few scratches at the back of the jet holder, and a slight nick under the "N" of Scranton. These are shown in a photo below.