Help identify mystery carburetor

[F1NE29]

My 29 came with this unknown carburetor. I have a Zenith said to be shot and needing work. While I figure out the Zenith, I would like to know what is currently on my engine. Can anyone identify this?
The car runs good with it. The a/f mix on the choke does not work, it looks be be mounted solid but other then that the car will get up and go quite well.

 

[Rock Hornbuckle]

That is the new Zenith #13922. It's a great carb. I have one on my '29. There is no Gav on the choke rod. Zenith made this to replace the model used on the A.

Distrubuted by Automotive test systems Inc.
Port Townsend Wa. 98368
800-255-8378

You can google them.

 

[Rock Hornbuckle]

You will find 'Zenith' on the back of the carb.