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All wound up

Before a mechanical watch movement can start moving, it needs an energy source to drive it. That energy source is the mainspring. And while there are some who enjoy engaging with the machine, lovingly winding it by hand, others take pleasure in the automatic mechanism, which will keep the watch running indefinitely, simply from the movements of the wearer's arm.

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Experiences

Cal. 87

Date — 28 September, 2011

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Of the many legendary hand-wound movements made by IWC, the 87 calibre holds a very special place.

This is because it was the first tonneau-shaped wristwatch movement that could be fitted into both rectangular and tonneau-shaped wristwatch cases, which were very much en vogue in the 1930s. With its screw balance and Breguet spring – but minus a shock-absorption system – it was extremely accurate and showed the precise time on a small seconds and the hour and minute hands. Altogether, 18,400 of them were produced between 1931 and 1947. Today, IWC watches with the 87 calibre are much-coveted collector’s items.

  • Dimensions: 20 × 25 mm
  • Height: 3.65 mm
  • Frequency: 18,000 bph (2.5 Hz)
  • Number of jewels: 15, 16 and 17

A SIMPLE, TIMELESSLY ELEGANT WATCH COMBINING OUTSTANDING DESIGN AND FUNCTIONALITY.

Explore More Articles
Unruhreif_Spirale.jpg
Balance of power

A mechanical watch continues to show the correct time even as the tension in the mainspring diminishes. Making this possible is a mechanism that has been gradually improved for over 300 years: the escapement.

IWC 52000 Calibre Movement
IWC’s New
Proprietary 52000-Calibre
Family

The newly developed 52000-calibre family, developed and produced in-house will feature numerous technical improvements.

IWC_customer_service_972x516
Craftsmanship that keeps watches running for generations

Given regular servicing, a quality timepiece will go on working reliably and precisely for many, many years.

IWC_Perfectionists
Perfectionists in their element

Every new in-house movement created by IWC in Schaffhausen involves around 20 specialists from various departments, sometimes working together intensively for years. With the help of state-of-the-art computer technology, the design engineers generate solutions whose elegance can be quite simply breathtaking.

Haute_Horlogerie_quer
All wound up

Before a mechanical watch movement can start moving, it needs an energy source to drive it. That energy source is the mainspring. And while there are some who enjoy engaging with the machine, lovingly winding it by hand, others take pleasure in the automatic mechanism, which will keep the watch running indefinitely, simply from the movements of the wearer's arm.

IWC Oils
Time That Runs Like Clockwork

Depending on the stresses and strains to which they are exposed, around 50 points in the movement are treated with oils and greases developed especially for use in wristwatches.

Test Lab

At IWC Schaffhausen, new watch models are put through a gruelling test program involving up to 50 separate stages that include long-term immersion in warm salt water and being locked away in an environmental chamber. All this guarantees that they will be equipped for everyday use – and much more – when they finally reach their future owners.

Sound_check_engine_AMG_972x426
Sound Check

How the engineers at Mercedes AMG in Affalterbach, southern Germany, create the right engine sound.