De Bethune Tourbillon

A masterpiece from the prestigious watch manufacturer De Bethune

 
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Published by 3781 on October 23 2010, 18:01.

It took more than two and a half years of development for the DE BETHUNE Manufacture to present the final version of its silicon / titanium tourbillon, the lightest tourbillon in the world with a remarkable frequency of 36,000 vibrations per hour.

This tourbillion differs from others in its design, since it has been adapted and calculated for a wristwatch, as opposed to existing tourbillons which are smaller versions of those used in pocket watches.

Technical description
Case material : platinum
Case shape : form
Case dimensions : 42.8mm in diameter and 11.3mm thick
Lugs : pivoted
Hands : hand‐polished steel
Strap : alligator leather with traditional ardillon buckle
Crystal : sapphire, 1800 Vickers hardness with double anti‐reflective
treatment
Crown : screw‐down at 12 o’clock – setting in two positions
Movement : DB 2009 – hand‐wound mechanical – 298 parts –
decorated and “colimaçonné” by hand, steel chamfered
and polished by hand – self‐adjusting double spring barrel
– titanium / platinum balance with flat terminal curve or
temperature‐compensated silicon / platinum balance
Functions : hour, minute, seconds in 30” – power reserve indicator on
the back
Specifications : silicon / titanium tourbillon
Jewels : 31
Frequency : 36’000 vibrations per hour
Power reserve : 5 days

 
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