Great! That is a great memory to me from the 44th railway line, telephone and signal line between Nagydorog-Szedres, in my region. I remember to this pole top style from my child age when we went by the train..

http://myinsulators.com/hungary/kepek/tech/pole/vegy02.gif

And I want build up this pole style too for memory:

http://myinsulators.com/hungary/kepek/tech/pole/vegy01.gif

And I have this already:

http://myinsulators.com/hungary/kepek/tech/pole/vegy05.gif