Carburetor Housing Gasket

[Ron in Quincy]

A number of years ago I acquired a early Holley Double Venturi Carb. It was complete and appeared to never have been apart or rebuilt.
The unique difference was the housing gasket; I have never seen another one like it even though I have had numerous double venture carbs, both Holley and Zenith , over the years.

Has anyone ever seen a housing gasket like this one ?

Ron

 

[Ron in Quincy]

Btt

 

[Rich in Tucson]

Just guessing but perhaps that was a very early gasket supplied by Zenith in a very early Model A carb based on their experience with their airplane carbs - to keep the fuel in the bowl from sloshing away from the outlets during extreme roll and pitch maneuvers?

Or an adaptation for that effect by the Pietenpol enthusiasts?? Try doing a roll followed by a loop-de-loop and see if she keeps running....