Here is a very beautiful Light Cornflower Blue glass insulator from Argentina directly out of my collection. Embossed (lightly): Cristalerias Vidrart S.A. (mold nr) EN.Tel A17 (front) AISLATRON Industria Argentina (reverse). Looks Mint condition to me! Anyone who hasn't seen these in person is missing out! The color really glows in the sunlight. There is some evidence that suggests the company that made these was an art glass company. If true, this could explain the brilliance of their insulators in varying shades of cornflower blue, sapphire blue and even cobalt blue. First email gets it for special sale price of $90 postpaid. Thanks Lena.