Photo 3 showing the corner pole for the single phase tap. Wow..lots of multiparts! Again, mostly O-B M-2751 multi's with a mix of what looks like Westinghouse M-2700. PG&E was a large user of Westinghouse insulators back in the days when the big W had a plant in Oakland. They also used lots of glass on the secondary voltage. and REAL crossarms on the secondary!