These double guys are nice. California installed them from the 40s until the mid 60s. The 40s double guys look real old,they are painted steel, the poles were made in sections rather than being tapered. This one is mid 50s to mid 60s.
I like that setup and the pole looks like its in great shape we had some set ups like this (just for street lighting) with OV-20s on them but they where all wiped out in the great MV to HPS conversion in the late 70s
Unfortunately Stronger steel and wider roads rendered them obselete.