RARE Glass newel post finial Boule Escalier Boston & Sandwich or Baccarat c.1860

Description

I have been given conflicting information on the origin of this rare old glass newel post finial, also called a "
Boule Escalier
" or in English, "stair ball". Several sources say Boston & Sandwich Glass and another says Baccarat. To me it seems to be cut glass not pressed, but I may be wrong.
In either case it is a rare hard to find piece and dates to 1850s-80s. It is green cut to clear with a star at top and puntys all around. It seems to be lined with a thin reflective liner like mercury glass which is worn off/ peeling in most areas.  It looks to have been reattached to the bronze base at some period of time with some sort of glue or caulking?
Ball is  approx 4 1/4" diameter, 12" in
circumference and approx 3 1/2"  6" tall overal with mount, mount base diameter 2 1/2" and base it self is 2 3/8" tall.
A beautiful old piece. It will be doubled boxed to protect it during shipment.
Provenance:
This newel post finial was owned by Roger Babson Webber of Beacon Hill, Boston and the nearby town of New Boston MA. Roger owned a large collection of American antiques, paintings and books. When he passed away in 1984, these items were passed to his sisters. Roger was the grandson of Roger Ward Babson (1875-1967), a prominent noted American economist, entrepreneur and philanthropist.  Babson was a tenth generation Gloucester Massachusetts Babson who’s earliest American relative, Isabel Babson (a midwife) arrived with her sons in Salem Mass in 1637.
Many items in Roger Babson’s  and Roger Babson Webber's estate were documented to have come directly to the Babson family from preceding  family members... some of who were generations of sea captains based out of Gloucester. They imported Chinese export and items from England and the continent to America in the late 1700s and early to mid 1800s. There is is a lot of information about Roger Ward Babson on the internet which you may find interesting.