High compression heads?

[Brad in Germany]

At Rétromobile in Paris, France last year I saw this rather interesting Model A head. It was made by the "Etablisement Veyet", Lyon, France.


What does the extra set of spark plugs do? I believe it might have been an attempt to squeeze a little more power out of the smaller AF engine that it is mounted on.

The engine is located in central France. His asking price for the entire engine as pictured is 1500 Euro ($1875.-) and he does not know what the condition of the engine is....

Fordially,
Brad