Help needed identifing this plow

[dkryzer]

I have this single bottom breaker plow that I'm trying to figure out who manufactured it. The only markings on the plow are the individual part numbers that are part of each casting. Any info would be greatly appreciated.

 

[fluggies4]

Sometimes the part numbers will give a clue. Some of the old-time manufacturers like Massey and Cockshutt had combinations of letters and numbers. Can you see anything on the back side of the mouldboard, share, or landside?
The wearing parts are in really good condition.

 

[dkryzer]

The individual part numbers all start with E.P. Example: E.P. 358
Unfortunately the markings on the mouldbord can't be read.