Some recent additions to my MIVA collection are (left to right) the MIVA A 318-CA, MIVA M 315-CA and the MIVA M 312-CA. The MIVA M 312-CA (CD 375) is a 12KV rated insulator, the MIVA M 315-CA (CD 376) is the 15KV rated insulator and the MIVA A 318-CA (CD 376.x) is the 18KV rated insulator. All of these are in fantastic shape considering their age and all are emerald green glass color.

The interesting difference between the A 318-CA and the M 315-CA is the bottom/middle shell hieght. Surprisingly the M 315-CA is taller. The A 318-CA has a slightly wider top shell. I will post a detailed picture of the A 318-CA and the M 315-CA.

I do have a M 318-CA that I need to compare this A 318-CA variation to.