With Patek Philippe Extract from the Archives confirming production of the present watch in 2005 and its subsequent sale on July 27th of the same year.
According to our researches, the present watch is believed to be the third example of a first series reference 3940 in platinum to appear in public to date.
Reference 3940 was launched in 1985 and remained in production until 2006. The present watch is from the first series, featuring sunken subsidiary dials for the 24 hours display and leap year indicator, as opposed to the even version of later models.
The model is illustrated in Patek Philippe Wristwatches by M. Huber & A. Banbery, second edition, pp. 292-293.