Hi
Welcome to the forum and thanks for all the great photos.
This is a handblown bottle and is made in the spirit of 19th century glass, but it is modern. There is a lot of modern glass with ribbed bodies like this which was/is made in Mexico and undoubtedly other places. This piece could very well just be the product of a US glass studio.
I think you will find by comparing this bottle to authentic examples that the pontil mark appears differently and that subtle characteristics of the glass will not match with earlier glass. Consider it a good study piece and consider attending an antique bottle or antique glass show to handle and examine glass. It is a great way to learn.
Chris