I friend brought this to me and asked if I knew any thing about it. It has no markings but would appear to be a self contained flintlock pan powder measure with vent pick. I said I would post it on the forums for him.
The vent pick screws into the top of the cylinder which would contain some 4F. The top is sprung loaded, and when pressed, opens up a little hole in the bottom, which feeds into a small funnel measure.
Can anyone please tell me anything more about its history?