The Seles one is simply an older model. Selmer Paris originally sold these under a subsidiary brand. The second generation of horns are simply labeled "Axos" and marketed as a full-fledged member of the Selmer Paris line.
The GL probably just stands for "gold lacquer", though I'm not sure they are available in any other finish.
Production flow changed with respect to where offshore/onshore various parts were manufactured and assembled. The newer tenor was marketed as a Selmer Axos so the alto Seles brand was eliminated to match.
I'm told the body tube is basically a Serie II, and I have no information that it hasn't stayed constant. Dave Kessler in Las Vegas is most knowledgable in the US and would discuss with you if you call him.
My first alto was a Seles Axos but the discount vibe bugged me so I got a Serie II Jubilee and then a Ref 54. Stupid, the Axos was a fantastic horn with parts, fit and finish as good as any other SP. The case was a slightly simplified BAM OEM as for Serie II and III but really nice.
A new Axos will need "final assembly" set-up like every SP horn but then in my opinion the quality is as good as a YAS-62III or Yany AWO1. Resistance and ergonomics then become the selection factors at that price point in my opinion, not brand or quality.
A forum community dedicated to saxophone players and enthusiasts originally founded by Harri Rautiainen. Come join the discussion about collections, care, displays, models, styles, reviews, accessories, classifieds, and more!