Actually..No.That didnt even occur to me.This particular standard model is not equipped with the vent system.You can see in the posted pics as there is no insignia and no vent.But in any event...that idea didnt cross my mind.I was interested in pics of the "Stutze",materials of its construction and the innnermost linning materials of this area.Also the inner cap band structure and material.As the sweatband is damaged it appears the this area is readily visible.Anyway...sharp guess though ,Violin
