Si14 plastic balance spring---Omega DeVille Chronograph Co-Axial Calibre 9301

In 2007, the De Ville was the starting pad for that company’s first in-house movement, co-axial Caliber 8500/8501 - inside a watch which marked the debut of the exhibitionist Hour Vision case. More lately, Omega used the De Ville Hour Vision Annual Calendar for that debut of some other technical innovation, its Si14 plastic balance spring.

The Omega De Ville Chronograph consists of Omega’s Caliber 9300/9301, the chronograph version of the in-house movement that made its debut within the Hour Vision models. The movement utilizes a column-wheel system and it is outfitted having a co-axial escapement as well as a Si14 plastic balance spring. 

It's been licensed like a chronometer through the Swiss testing agency COSC. So convinced is Omega of the reliability and stability of their movement it provides each watch having a four-year warranty.

This 18k rose-gold case is 42 mm across featuring polished and brushed finishes. The two-zone blue dial has two domed sub-dials: the main one at 3 o’clock shows both 60-minute and 12-hour counters for that chronograph, which makes it readable passed occasions the main one at 9 o’clock is perfect for the important seconds. The watch includes a central chronograph seconds hand and 18k-gold, diamond-polished, faceted central hour and minute hands. 

The applied Roman numeral indices will also be gold, faceted around the sides and finishes, and fully diamond-polished. Brown or blue leather strap, or having a stainless steel case on the stainless steel bracelet or on the black or blue leather strap. The hour hand could be transformed without having affected the minute and second hands, a benefit for frequent vacationers who traverse multiple time zones.

The movement, that is visible with the case’s sapphire exhibition back, comes with an 18k gold rotor and balance bridge. Other adornments around the movement include Geneva waves in Arabesque and blackened screws, barrels and balance wheel.

The rose-gold model proven here - using its blue alligator leather strap matching the dial - can also be provided with an opaline silver dial. There's additionally a model inside a stainless-steel case, with a range of blue, opaline silver or black dials, and a range of black or blue strap or steel bracelet. 

These models contain Omega Caliber 9300, that is identical in function towards the rose-gold model’s Caliber 9301 but includes a rhodium-plated rotor and balance bridge instead of gold ones. Costs are $29,000 for that rose-gold model, $8,300 for stainless steel on the leather strap, and $9,000 for stainless steel with bracelet.