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Can anyone help me to identify this American insulator?

PostPosted: Fri Apr 21, 2017 12:27 pm
by Nicholas Green
I am new to insulator collecting and I have acquired this rater interesting insulator made by Ohio Brass.

It appears to be similar to an Ohio Brass M-4395, but it isn't grey and the "dome" is metal
s-l1600-14.jpg (129.01 KiB) Viewed 2727 times

A top view, showing the metal "dome"
s-l1600-19.jpg (189.65 KiB) Viewed 2727 times

The markings on the insulator
s-l1600-21.jpg (180.2 KiB) Viewed 2727 times

Any help in identifying this insulator would be much appreciated