Antique NPW Umbrella Parasol Handle Only Vtg

Description

Antique parasol handle.  Marked "NPW" and "PAT APPLIED FOR" on the end.  The letters for Pat Applied For are doubled in the engraving.  Handle has seen  a lot of aging and use.  Handle only.
I don't know any of the materials in the handle.  There is a pearl-looking section near the handle.  It doesn't appear to be gold or gold fill, but I don't know what it's made of.  There is a line along the handle (a seam?) and a seam around the handle at the end.
Approximately 10.5 inches long.
Lots of dark spots along handle.  Rusted spot at slot at end for umbrella.  Shows signs of use and age.  Scratching.  Small green areas along seam to body in the middle.  Spotting to pearl portion and rough in one spot along edge.  Needs cleaning and restoration. I don't know any of the materials used in the handle.
Please feel free to message me for additional photos of any particular areas, or with any questions.