I have a straight neck I like, but I'm interested in trying a curved neck to fit a Yanagisawa S880 or S990. I think these are the same fittings. With these horns octave key lever extends beyond the flange over the tenon. the lever of the octave key on S991 models stops over the flange.
Here is a pic of what I need.
At the right (very low) price, I might even consider a Yanagisawa copy neck. Color and material are not important to me. I think all of these are going to be brass anyway.