Blancpain Villeret Ladies’ Perpetual Calendar with Calibre 5621 – The World’s Thinnest Perpetual Calendar

Introduced in 2006, the Blancpain Villeret Ladies’ Ultra Slim Perpetual Calendar is the thinnest perpetual calendar wristwatch ever made.

The creation of a complicated women’s watch presents a peculiar challenge. Virtually all wristwatch complications were conceived and the traditional design approaches developed in the setting of pocket watches.

Many collectors today take for granted the enormous barriers confronted and crossed by master watchmakers who have taken complications imagined in the relatively large scale of a pocket watch and transformed them to exist in the diminutive space of a wristwatch. Imagine then the new difficulties of going even further down the scale of miniaturization to adapt complicated movements to the further reduced size of a women’s watch.

Blancpain Villeret Ladies’ Ultra Slim Perpetual Calendar (reference 6156-1542-55)

The perpetual calendar is perhaps the most useful of all complications. Collectors the world over aspire to owning such a calendar that always shows the correct date, precisely accounting for the vexing differences in the length of months, including leap years, introduced by Julius Caesar and modified by Pope Gregory XIII for our modern calendar.

Blancpain’s master watchmakers have taken this most practical of complications and brought it into the world of ladies’ watch dimensions. In so doing they have not only righted an industry tendency to deprive women of a core complication, but they have also achieved a world record in the process: the world’s thinnest perpetual calendar watch.

Equipped with the Blancpain Calibre 5621 hand-wound mechanical movement, this Perpetual Calendar watch for women indicates the day date, month and moon phases.

Made of 18 carat white gold, the Blancpain Villeret Ladies’ Ultra Slim Perpetual Calendar watch (reference 6156-1542-55) has a case diameter of 34mm and thickness of 6.76 mm. Fitted with sapphire crystals on front and back sides of the case, the watch offers a water resistance of 30 meters.

The manual-winding mechanical movement is capable of providing 40-hour power reserve once fully wound. Boasting an Opaline dial, the Blancpain Villeret Ladies’ Ultra Slim Perpetual Calendar watch was a limited edition of 20 pieces.

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