Amati Stencils
Amati Stencils
These appear to be stencils of the Julius Keilwerth EX90III intermediate model, which were either completely made by or just assembled by Amati.
B&S Stencils
B&S Stencils
These appear to be stencils of the B&S Series 1000 intermediate horns.
Taiwanese or Chinese Stencils
Taiwanese or Chinese Stencils
I don't know which company made these horns. They don't look like the Julius Keilwerth or B&S horns.