If I’m being honest, just about no one will use this for its actual purposes, so in my personal view a sapphire caseback to see the action is an upgrade.
My only wish, which is also incongruent for it’s true purpose is that it had the “School Bell” ring (found in the Extreme World Alarm, Master Memoxox, etc.) vs. the vibrating ring which of course is more when underwater. From your description you mentioned it sounded more crystalline... does this mean the sound is somewhere between the vibrating ring and the school bell ring? I’m not positive I understood correctly from your description.
Thanks for the great write up, Nico. Now have a talk with JLC to get the price down a tad😉