Patek Philippe Split Second Chronograph, Model # 5004J. 18kt yellow gold 36.7mm case with a crocodile leather strap and 18k yellow gold deploy buckle. Manual wind movement. AM/PM indicator, hours, minutes, seconds, date, day, leap year, month, moonphase, chronograph with split second functions. Perpetual calendar

　　watch will correctly adjust for short and long months as well as 28/29 days of February once every 4 years. Split Second

　　a chronograph with two center seconds hands, the extra hand runs concurrently with the main chronograph hand but can be stopped independently then made to catch up with the running chronograph. Thus called the Split Seconds hand which refers to two hands

　　a flyback (Rattrapante) hand and a regular chronograph hand. Both hands move together with the ability to time laps or multiple finishing times, the wearer can stop the flyback hand while the chronograph hand continues. This, in effect, splits the hand in two. The split seconds thus allows recording the successive or additional times of events that start together. (Patek Philippe offers a wide variety of color in leather straps, usually black or brown.)

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