Can anyone ID this transformer logo? Looks sort of like "PE"

[EastPoint]

Any ideas? This is on an 18-lb power transformer from a huge power supply, possibly 1970s. Might be German, not sure.

 

[primosounds]

Wiring looks too new for 70s. Is it from a music amp?

 

[EastPoint]

No, some sort of giant power supply, possibly homebrew.