Another mystery carb identity

[David31dlxslant]

I've been buying and collecting,restoring, selling original zenith carburetors for about 10 years and have not seen another example of an upper body made by zenith with an embossed "Z" below the throttle shaft, all I've ever seen is the typical indented Z below the throttle shaft. Has anyone else seen one like this?

 

[David31dlxslant]

Sideview showing the Z protruding outwards

 

[Gary Karr]

Look at the engine side of the throttle shaft bore. If it is a blind hole or filled in, it is then a January 1929 only Holly top with sideways "H" that on mine looks like a raised "Z".

 

[Joop]

Like this


..

 

[David31dlxslant]

The opposite side hole has the brass plug that zenith did unlike the Holley tops, I have seen some very early Holley tops with that brass plug though, but just to help clarify I took this carb apart the other night and was looking in it and everything is original, original correct #'d jets, original zenith float, original zenith float hanger stamped with the Z with the circle around it just like the float and the throttle plate stamp with the Z as we'll, there's no doubt it's a zenith top and not a Holley