turbin33: Welcome to SOTW. I'm only guessing, but in my experience, most alto saxophones are of similar measurements and design, especially those patterned after the Balanced Action Selmers. Yes, there are exceptions like the large-bell TH&C Bueschers and Cannonball Big bell series. But the AW01 (of which I own one) and the Selmer SA80's are similar enough that I'd think any case that fit one would fit the other.
I've even been able to use one case to accommodate split-bell-pad altos from the '20's , left-side bell-pads from the '30's, and modern altos with right-side bell-pads, as long as the bells' diameters were similar. DAVE
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