26152AU.OO.D002CR.01 Audemars Piguet This watch has 47mm X 42mm black case made of forged carbon fibers – an extremely light weight & hard material. Power Reserve indicator hand located immediately to the left of the center of the dial & points to the reserve scale on the dial edge between the 7 & 10 o’clock positions. The watch has an amazing 10 day power reserve is achieved through the use of 2 barrels. Each barrel is wound by a mere 19.75 turns. Although the use of 2 barrels allow for a power reserve of 290 hours, however, an ingenious locking system – in the low and high winding-level zones – concentrates the running time on a 237-hour period, thereby ensuring optimal operation. Chronograph/Stopwatch function: Large red central sweep seconds counter hand. 30 minute counter sub-dial located at the 12 o’clock position. Tourbillon – At the 9 o’clock position is composed of roughly 80 parts. The Tourbillon is secured by a styled blackened steel bridge. AP caliber 2884 beats at 21,600 vph & contains 30 jewels, composed of 336 parts & with an approximate Power Reserve of 240 hours (10 days). Water resistant at 100 meters / 330 feet. All preowned watches are not returnable. One year warranty for all watches 26152AU.OO.D002CR.01 Audemars Piguet Carbon Watch.