Presented here is an insulator from Spain. Front skirt embossed ASTURIAS. Rear skirt embossed TRANSMISIONES. This is an interesting piece because its color is close to black glass. The insulator is a very dark green. Even in a light cabinet, little light passes through it. A must have for the CD 154 or foreign glass collector. Other CD 154 insulators produced that are close to black glass are Columbian Zicme ( purple black glass) Chilean Cristalerias ( green black glass) and American Whitall Tatum ( Dark Red black glass).