Zenith Carb .... for what?

I have a ZENITH Carb I ran across in an old barn that has been there since the early 70's at least. It is marked "ZENITH MADE IN USA", has a "1" stamped on it as well as "2E" (but the "E" is backwards). There are a couple random numbers stamped on it; "K5" and "54". Any help in identifying it and a ball park value would be appreciated. Thanks

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Zenith K-5 was used on the F-20, probably others.

Looks like the ones our ole F-20's had, when we had that fleet of them! thanks; sonny

Thanks Jim & Sonny!