Gotta love the "Donut Tree" as I fondly recall ;-) This was along Forest Avenue, about a half-mile east of the century-plus-old Brockton Fairgrounds. This is among my memory lane stuff that got me into gawking at and later collecting utility stuff (starting with insulators) having been born and brought up in Brockton, MA.

Wooden pins were the rule with the Brockton Edison Company until around 1960 when they started to use lead-headed steel pins. Here we see a nice old line built around the 1930s with nothing but black transformers, brown insulators and similarly colored lightning arrestors and (LM) box cutouts. I grew up in Brockton and recall scenes like this very fondly. In the early 80s most of the poles were replaced owing to boring 13.8 kv primary conversions and replacement of the late 1950s mercury vapor street lights (shown are 175W Westinghouse OV-10 models) with high pressure sodium fixtures.

Their pintypes and multiparts almost exclusively were Lockes from the teens and for some reason I have ever loved these simple porcelain insulators ever since, I wonder why?