Opinions on the heritage of this oc P3?

[ITM83A]

Traded my Leslie RS3L for this old beater OC P3 horn. The gullwing manifold was broken off the foot at some point in the past and rewelded, wouldnt hardly be visable if I repainted it. It has a single coat of dark green, almost GN/BNSF green but I didnt think that line was known for P3 horns. Horn came from Dillon Davis, he was told it might be SP, but there isnt a trace of SP gray paint anywhere I can find, just bare alum under the dark green. What is everybody elses thoughts? Also, anybody have 3 of the bronze diaphragms for a P series horn. I want to see if I swap those in, if the sound is closer to ITM 83A's OC P3 horn. The forward facing bells were mounted on the top side of the wings, I flipped them under for my set up.

[Mafarnz]

CNW?

[ITM83A]

I didnt realize CNW used the P3, thats a possibility with that shade of green