Just occurred to me, regarding the 136660…

[drrd]

I think that probably the only reason this was released was so they could roll out the 136668LB later.

They made the bezel a little thinner and the date window a little bigger. Small tweaks and hardly justifies a new reference.

In retrospect the most significant thing they did was shrink the steel retaining ring and enlarge the titanium puck on the caseback. My guess is that the larger and thinner 126660 caseback ring in gold would not have cut the mustard.

136660 did seem like an odd release at the time but in light of the 136668LB it makes sense.