... 223-88, has a silverized dial with guilloche pattern, so it is structured as well. I have seen only very few 40mm Dual Times without structured dial, one is the popular military dial version, the other one a rather rare galvanized dial with index diamonds.
Sorry, have no info on the weight, since the only dual time in the house is my wife's Lady GMT, that is of course lighter.
Will comment your other points later.
Regards,
Marcus