Dear G: It seems to me that was made in USA. I can read in the Sonus Dimension 5 ( a great great cartridge. ) manual: " Be certain that the replacement stylus bears the SONUS name and logo and is a genuine SONUS replacement made in USA by Sonic Research, Inc. ".
Certainly is dificult to be totally sure about because in those times ( like today ) there were only 3-4 stylus/cantilever sources all over the world.
I own the Blue along the D5 and is a very nice performer.
Regards and enjoy the music.
Raul.