aaronm
2923
Not always a chrono
The ROO frequently, but not always, has a chrono, there are some time-only ROO and some with calendar complications. When it does have a chrono, it has subdials at 6, 9 and 12, based on a custom chrono module, and the date under a dial-magnifier at 3. The RO chrono is based on the F Piguet 1185 chrono, and has subdials at 3,6 and 9, and an unmagnified date at about 4. I think the canonical differences are size (ROO are always bigger) and the use of rubber, not 100% of the ROOs have rubber bits on the case, but the majority do. Even the early ROO Annual Calendar had a visible thick rubber gasket between the bezel and the case and a rubber crown.
As a side note, there are a vast number of ROO models, special editions for this and that, sometimes with unusual case materials, sometimes just with different colors.
And since you always need a photo, here's a time-only ROO, the Geneva boutique edition
And the movement of a ROO triple-date. You can see the rubber-sheathed crown at the top of the pic
A
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Royal Oak vs. Royal Oak Offshore
Not always a chrono
Aaron provided a useful primer. A few more comments...
