Engraved Star Locket - Gold Filled - Vintage

Lovely rare shaped engraved gold filled locket circa early 1900s.  Ornate engraved pattern and a paste stone with star engraving around it.  Paste has darkened with age.  Measures just over 1 inch x 0.75 inches.  One frame and acetate present.  Some wear to front and back of locket (see photos).  Unmarked but looks to be gold filled.  Note ideally needs top jumpring to be worn.  I can add before shipping (but won’t be soldiered closed).