Agreed the 6610 is underrated. It shares aspects of the no crown guard that give it a special place. A gilt chapter ring 6610 is a sight to behold. The challenge is the size. Which is really the only thing holding it back. It is the biggest of the explorer I range but seems to wear smaller than it actually is. I grasping at straws but that is the only issue. I had that issue with the 6202. I would say the same thing about the 5508 and 6536 but the bezel covers the wrist presence issue. A collection is not complete without a few of these in every case.
Bill