1800’s Blue Opalescent Glass Light Bobeche

1800’s RARE Fluted/Crimped Blue Opalescent Glass Candle/Gas Light Bobeche.
Measures approx. 3 7/16″ in diameter on the outside & the middle opening measures about 1 5/16″.
This bobeche in excellent condition with rim flaking & finger roughness on the underside middle opening.