Another what's-this-here-thing?

[Londonshooter]

Came along with various other gems in an antique oak/leather shotgun case. Seems to be a measure but if for loading shot or powder then its for a massive gun...maybe for measuring small quantities by volume for retail?

 

[Snake Plisken]

That much powder? Maybe in a punt gun

 

[buzzmagoo]

Yup ! Would be my guess as well ( punt gun powder measure)

 

[Londonshooter]

I wondered if maybe signal cannon...

 

[sgt.rock]

Shot measure?