Paul,
This actually looks like a Line- Stabilisation Xformer, as it feeds on to the next set of lines, head away to the right of the pic.
It's obviously a fair way out in the country, judging by the age of the pole?.
I take it that this is not a take off Xformer?.
Your thoughts please. [Linked Image]
This is what we call a Can type Xformer, over here.