Are there older electrical poles near where you live? I notice the pole near our house has 1974 stamp on it. So it's somewhat older, plus it's older than our house, since house next door was older.
Some of the poles in my area were replaced with metal poles, during this year, and some also with newer wooden poles after hurricanes. After the Hurricane Irma, I had seen some poles, where the crossarms broke off of the rest of the pole and were hanging from the power lines. They replaced soon after though.
There is a
pole in our yard with a 1982 inspection tag, the house was built in 1988 maybe the pole was powering the house that was there before they built ours.