This Miva M 312 CA is a three part, glass insulator, rated at 12 KV. The "CA" indicates that the top cable groove is wider, to accomodate aluminum, rather than, copper power cable. The top shell is approximately 5 1/4 inches diameter, and the overall height is approximately 4 5/8 inches. Glass is a light sage green color. I obtained this from the USA, through ICON recently. This is a cropped, and enlarged version of the seller's original photo, I will take an outdoor photo at a later date. [id=276337604; Miva M 312 CA, outdoor shot CD 375]

Embossing is on the top sides of the dome, and is fairly weak in this example.

M represents "Medium" voltage rating (A would represent high "Alto" Voltage, and B represents low "Basso" voltage).

This is similar in size to the CD 375s 10KV rated, Fidenza 6310 and N°10-B as shown [id=259321291; FIDENZA 10B and 6310]

Nora has a photo of three colors of M 312 CAs [id=192967697; All the colors of the MIVA M 312 CA ]