Found these on an old line in Illinois 2 summers ago. Each crossarm had one of the upper right for some distance. The picture is dark, but all the 164s we removed are cloudy lemon-lime. Really cool to find these still in service. We returned in October to retrieve the countless remaining ones. The poles were buzzed down & gone. As Longfellow nearly wrote: "Progress is the adversary old". Chopping down a pole of glass is like buzzing down a majestic Redwood. Sad.