...Finally! Found and purchased the very illusive dual-tone horns used by the 914-6 GT. More photos to follow once they arrive. BTW, these babies are "NOS" and paid less than $100!!! This is how you build a "GT" today, you find one part at a time, over a very long period of time... lol

This style dual-horns were produced over several years and later offered in newer packaging http://www.pbase.com/9146gt/image/132670589. By coincidence, the photo of the horns "original box" I just purchased http://www.pbase.com/9146gt/image/136288606 is exactly the same as these two sample photos; http://www.pbase.com/9146gt/image/134703012 + http://www.pbase.com/9146gt/image/134703008 and probably over 35 years old. They appear very vintage.