Saxophones King 660 - Not sure who made this? King; Conn; Keilwerth; Armstrong...?

[JayeNM]

JayeNM,
You have never held an M4 model in your hands, yet you very quickly concluded that the M4 is the same as the M25 (I find your arguments, that differences in dimensions at key points between the models, don't matter unconvincing).
You wrote that you have repaired numerous saxophones. Can you tell me what is shown in the photo?

Hint: it is an American saxophone (not Chinese).

...the contentiousness of some of your replies to me continue to be baffling to me....

We are trying to suss out what these are.

THE REASON I SPECULATED 4m and 25m MAY BE SAME DESIGN...

...is because YOU PROVIDED THE MEASUREMENTS suggesting they are ...those measurements are the same, my friend.
Your miniscule differences of .1-.4mm in some measurements are so minute as to likely be small factory allowances of the day.

If we want a concrete answer here, post like twelve measurements of the bodies of both.... and, one last time (my third request...first two you ignored)...post the results of the 'neck natural pitch' comparison.

Then we can stop spinning our wheels here.

 

[JayeNM]

I was joking a little. It’s not a King 660 or rather, not exactly this model.
It’s a King Super 21. Yes, that’s no joke; it’s a genuine Super 21.
They seem to come in a few variations: some with a solid silver bell and neck, and possibly others with a standard bell (I’m not sure). The guys used a cheap student model alto as the base for this new, exclusive, and rare saxophone.
Photos below.
They took several King 660 altos with serial numbers 730K–735K and modified them.

Horrific horn....literally a blinged-out 20m. That was one BAD executive decision....Super 21...smh