With Patek Philippe Extract from the Archives confirming production of the present watch in 2001 and its subsequent sale on January 29th of the same year.
The reference 5100 was launched by Patek Philippe in 2000 to celebrate the new millenium. It was the first watch the firm produced featuring a ten-day power reserve.
A total of 3100 pieces were produced: 1,500 in yellow gold, 750 in pink gold, 450 in white gold and 300 in platinum.
A similar model is illustrated in Patek Philippe Wristwatches, by O. Patrizzi, Volume 2, p. 306, pl. 1244.