[Chuck Schwark]

I believe the 38-116 models were virtually identical witht he 37-116's, just brought out the next model year with different cabinetry. So it would make sense you'd see a "37" speaker in an early "38" version of the same "116" set.

Could have been factory or later "repair" by someone??

Unless you're getting distortions or excessive output tube current draw, I'd stick with the speaker that came with the set.

Ron may be able to confirm my suspicions......