No, Dave...best I can tell, from the presence of these braces on numerous old buildings, they were once a standard way of supporting the service drop- back in the days of 30 amp services and #10 feeders! Why there are two, I just don't know.
Another type of older support was a wood "Tee" projecting above the roof, with insulators.
Maybe, just maybe, one brace received the service from the pole, and insulators were mounted on the second...I just don't know.