I have seen that where they have gone from O/H to U/G many times here in the city where they can't change the original point of entry / metering because it would be impractical.
OR in regards to that double headed piece of pipe, I have seen that done where the PoCo changes the overhead drop a bit and for whatever reason and the new drop /point of attachment would end up being too close to a window / door / balcony or yet again, too far from the original point of attachment / metering..

I can't say I have seen one this ugly though wink

A.D