This watch is accompanied by its Patek Philippe Certificate of Origin stating the original date of sale of April 1982, red leather folder and Patek Philippe wooden presentation box.
At any given moment, so-called mean solar time deviates by a few minutes from true, or apparent, solar time. This difference is referred to as the equation of time. It varies from day to day and in mechanical watches can be displayed with the aid of a highly complex cam mechanism.
The present watch is part of a series strictly limited to four examples only, made by special order of Chronometrie Beyer, Zurich, in the early 1980s for some of the company's most important clients.
Research has resulted in the identification of all four watches. It is interesting to know that three are fitted with a hunter case (reference 881/1) and one with a openface case (reference 880/1).
Movement no. 866'569
Openface, reference 880/1. Originally sold to a Swiss client, now property of a gentleman.
Movement no. 866'713
Plain hunter case, reference 881/1. Originally sold to a European client, subsequently sold at Christie's Geneva, 18 November 2003, lot 78, for SFr.143,400.00.
Movement no. 866'714
The present watch. Engine-turned hunter case, reference 881/1. Originally sold to an American client.
Movement no. 866'721
Engine-turned hunter case, reference 881/1. Originally sold to a Swiss client. Through donation now in the collection of the Musie d'Horlogerie du Locle, Chateau du Mont, Le Locle.
We are indebted to Mr. Rene Beyer, Chronometrie Beyer, Z,rich, for his exclusive advice on these four watches.