It is nice looking, I cant tell 100 percent for sure but the bottle looks machine made or it has a large Iron pontil mark.The top looks newer so I am leaning towards machine made 1910 to 1920 still a nice looking bottle though especially in a window.
Great color and I would bet it's a perfume / cologne. The shape is similar to my beloved WAW-WAW bottles but there are no Cobalt Blues. I agree with Steve, it looks fairly new, 20th century.