The 2015 Audemars Piguet Royal Oak Concept Tourbillon GMT replica watches (reference 26580IO OO D010CA SDT) also has a 2nd time zone indicator as its name suggests. It is located at 3 o’clock and can be operated by the pusher. It also has a day/night indicator, which is quite useful with a GMT function. In 2015, during the Salon International de la Haute Horlogerie (SIHH) in Geneva, Audemars Piguet replica watches will introduce a new Royal Oak Concept timepiece.
Just like the very first Royal Oak Concept replica watches in 2002, this 2015 version also has the crown setting indicator (perhaps AP was actually the first one to use this in replica watches? Not sure). At 6 o’clock you see the H, N and R indications for the crown. This means time-setting, neutral and winding. Below a picture of the very first Audemars Piguet Royal Oak Concept from 2002 (picture from Antiquorum).
The caliber 2930 movement has a tourbillon carriage located at 9 o’clock that shows the escapement making a full rotation every 60 seconds. This tourbillon carriage consists of 85 parts but only weighs 0,45 grams. AP claims that it takes their replica watchmakers up to 3 days to only complete the tourbillon part of the AAA replica watches.