Showing the T-1 power insulator posted a little earlier. The resolution is a bit fuzzy, and the further size reduction makes it a bit obscure. MIVA = Manifattura Isolatori Vetro - Acqui (Glass Insulator Manufacturers in Acqui) Dimensions are 112 mm base diameter, 97 mm height, 33 mm pinhole. Roughly 4.2" dia, 3.8 in tall, 1.3 in pinhole diameter