This is an antique French powder measure. No makers mark.

One side graduated 30, 35, 40. This would be for Decigrams of powder but this is not specified like it is on most measures.

This type is the least common type of French powder measure.

The handle has a flat end which I have recently discovered was designed as a rammer. The range of graduations of powder charge and diameter of the end of the handle indicate this was designed for 12 gauge cartridges.