In this case the main difference is the screw in Aneroid. You can see that on the Top of the Air Horn. It is that piece that seems to have a smokestack coming out of the top of it. This is for locating the Shaker Assembly.
Title: In this case the main difference is the screw in Aneroid. You can see that on the Top of the Air Horn. It is that piece that seems to have a smokestack coming out of the top of it. This is for locating the Shaker Assembly.
