Thats a beautiful watch, but $500 for a quartz watch? I agree that for sanitary reasons, you want a rubber or SS band. NATO and leather are just germ/bacteria traps.
Why not an A21j GMTIIc ? Solid GMT movement for your "military time" requirement, waterproof, and classy. She's a NURSE .. there's no way a mechanical movement is going to need manual winding when you are a nurse .. she must walk 10 miles a day.
Heck, man, you could buy her seven a21j GMT IIc watches for the price of that Swatch.