All the leading makers made pocket compasses of various types up to the first part of the twentieth century. These included pillar compasses, Napier compasses, and Swiss pattern folding compasses, each a marvel of engineering being capable of use as both pen and pencil compasses as well as as dividers. Often these were supplied in little Morocco covered cases.
A pillar compass, probably European, it can either be used as a five inch, double jointed compass (pen, pencil or divider) or as a pair of small pen and pencil bows. It is made of electrum and is probably early twentieth century.