I wonder how long it has been since Conn-Selmers were Taiwanese tho (beginner and intermediates).
I am familiar w/the Taiwan saxes you speak of, the 300, 500, 600 models, but I have worked on ones which I THOUGHT were later, the Preludes, 700, 711...and those are significantly inferior to the aforementioned models stamped Taiwan (although in their time, Conn-Selmer marketed 7XX as intermediates, the Taiwan-made 'base model' 300, as well as the 500, were far better saxes).
I had assumed that the Prelude 7XX series was a more recent instrument than the 300's, 500's, 600's.
Maybe I have the timeline backwards ? If the 7XX models were superceded by the 300-600 models, then indeed Conn-Selmer moved their production to Taiwan and the result was a much better horn. If the opposite, then they went Taiwan to China and the quality declined.
I gotta admit I do not spend much attention on Conn-Selmer. They seem to sell pretty well, new, even their student lines...but used, they are a pretty hard sell compared to a Jupiter, for example.
Their current student is a 201 and 301 and the intermediate is a 411 and 511. But I dunno where those are made, with certitude....do you ?
*edit...just saw a 301 used on eFlay, it is stamped Vietnam...