Very Nice pontiled Late 1850's- Early 1860's Umbrella Ink Bottle

Here is another nice estate sale find from last weekend. This is an Umbrella Ink bottle, most likely from the late 1850‘s-early 60's.
As you can see, it has a very nice rough pontil on the bottom. Here is a little background info.
Pontil mark – A iron rod was often stuck to the base of hand-blown bottles prior to approximately 1860. This allowed an assistant to hold the bottle while a glassblower would attach and finish the lip of the vessel. When the bottle was broken or sheared, a ring or area of rough glass or grey graphite remained.
This particular bottle is in great condition, not a chip or crack, doesn’t look like a dug bottle.
This is not one of the scarcer Umbrellas , those being brown, cobalt and amethyst, however, still a great find for $.50!
enjoy