I looked all over for photos that show what sort of baffle the Jody Jazz Jet mouthpiece has, but I couldn’t find any.
So…I had a Jet mouthpiece in the shop and took some pix which are below. The Jet has a high step baffle, like a Vandoren Jumbo Java. The Jumbo Java baffle is, if memory serves, flat whereas the Jet baffle has a mild rollover curve to it. It doesn’t have a bullet-shaped cutout like a Berg, but has a mild crescent cutout. The high step baffle of the Jet gives it a very small chamber which is apparent when you look up the shank bore.