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You are slightly confused.
This is a Stearman N2S and was not built by the Naval Aircraft Factory, which would then have made it an N3N.
The N3N is a completely different plane from the famous Stearman. The Stearman had a steel tube welded fuselage and the N3N had an aluminum channel fuselage.
And another thing, you cut off part of the plane in the bottom of the photo and left wasted space above the plane.