Decanter

I recently purchased this free blown glass decanter. It has impressions/denting in the top glass plug and the vase has some impressions or denting...possibly tool marks? The plug is glass and the the top of the plug is scalloped but the pinches are different sizes. There is a rough pontil mark on the bottom. The decanter approximately 11" with the plug and 7 3/4 without the plug. The width of the base is 3" and the widest part of the decanter is approximately 7" in width. The glass is a strange but pretty smoky gray/green and when I hold it up to a light, I can see through it. When I look through it in the light, I see hues of amber.  There are no chips or cracks that I can find.  Any help with identifiers and value would be greatly appreciated.