My grail watch would be a titanium cased diver, with large lume I could read by at night and which lume never faded, the watch powered by a self-winding automatic day/date movement which never needed repair, servicing or seals replacement, viewed through an unbreakable and unscratchable crystal surrounded by an unbreakable, unscratchable bezel ring. Just as soon as I find it, I will let you know the branding.