Vintage green glass isolator

This image shows a vintage A21 EIV glass insulator. Material and Color: It is made of solid, vibrant aqua-green glass. Function: Originally used as an electrical insulator for telegraph or telephone lines. Origin: This is an older model from France, marked with 'EIV' (manufacturer) and 'A21' (model). Current Use: Nowadays, these objects are often collected or repurposed as decorative items, such as candlesticks or lamps.