====== Cintrée Curvex ======
{{wst>image_cl|Franck Muller|Imperial Tourbillon 5850 T|[[Franck Muller Imperial Tourbillon 5850 T]] with the 4-fold incurvated case form "Cintrée Curvex"}}

Case form

==== The form concept ====
The term "Cintrée Curvex" (in English "arched in a curve") refers to the [[tonneau]]-shaped housing, which is typical for most of the models of [[Franck Muller]]. In contrast to the ordinary housings available on the market this is a more subtle design, because three curved axes of the watch converge at a single spherical point.

Watches of this design are incurvated at 3, 9, 6 and 12 o'clock, while at the classic tonneau shape they are only incurvated at 6 and 9 o'clock.

Correspondingly complex mechanical production methods and tools are needed to produce this form.

==== Variants ====
Housings of the collection //Cintrée Curvex// were ​​originally manufactured in seven different sizes, where each of the variants have been offered even in [[yellow gold]], [[rose gold]], [[red gold]], [[white gold]] and [[platinum]]. Meanwhile, according to the time trend, the Super-Large size has been added.

^No ^Type designation ^Width (mm)^Height (mm)^
^2500|Mini|20|27|
^2250|Lady|22|30|
^1750-1752|Small|25|35|
^7500-7502|Midsize|28.5|38.5|
^2852|Medium|31|43|
^5850|Large|32|45|
^6850/7850/7880|Magnum|34|45|
^8880-9885|Super-Large|39.6|55.4|


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