At the time this photo was taken, Bluffton, Indiana was still using the old 6.6A series street lighting loop, which only a few cities and towns were using at the time. The street lighting circuits were changed over to modern parallel circuit system a few years after the photo was taken.

In this shot the the porcelain insulator (U-399B) on the top right is doing want it is intended to do, splits the series loop that leads to the street lighting.

The two glass on the top crossarm left are two CD 230 Hemingray - 512's with the left one a D-512. The two glass insulators on the lower buckarm supporting the two wires from the series loop are most likely CD 239 Kimble - 830's.

Please note = I have posted this shot a few years back, but decided to add it to this series with better post processing and a higher resolution.

September 24, 2013