BARREL PAWL WITH PROGRESSIVE RECOIL
This device permits a profitable winding gain (circa 20 %), especially during the winding start.
It is also helpful in the distribution of the mainspring’s internal tension.
WINDING BARREL TEETH AND THIRD-WHEEL PINION WITH CENTRAL INVOLUTE PROFILE
The central involute profile of the winding barrel teeth and pinion provides an optimal pressure angle
of 20°. This promotes effective rotary motion and allows for compensation of possible variations in
the engagement of the going train, thus insuring excellent torque transmission with a distinct
improvement in performance.
- Bezel side: in sapphire (1,800 Vickers) with anti-glare coating (on both sides).
- Thickness: 1.00 mm
- Case back: in sapphire with anti-glare coating (on both sides)
- Thickness: 1.20 mm in the centre and 2.04 mm at the outer edges
- Movement dimensions: 32.55 mm x 30.80 mm
- Thickness: 12.70 mm
- Tourbillon diameter: 12.30 mm
- Balance wheel diameter: 10.00 mm
- Number of jewels: 21
- Balance wheel: Glucydur, 2 hands, 4 setting screws
- Moment of inertia: 11.50 mg.cm2, angle of lift 53°
- Frequency: 21,600 vph (3 Hz)
- Balance spring: ELINVAR by NIVAROX
- Shock protection: KIF ELASTOR KE 160 B28
- Barrel arbor: in nickel-free Chronifer (DIN x 46 Cr13 + S), with the following characteristics: stainless,
- Plate and bridges in grade 5 microblasted titanium - Hand-polished and drawn bevelling
- Microblasted milled sections
- Drawn outer faces
- Polished sinks
- Microblasted surfaces
- Satin-brushed surfaces
- Hand-polished bevelling
- Lengthwise hand-drawn strokes on top
- Lengthwise hand-drawn strokes on the sides
- Polished sinks
- Lapped and polished ends
- Burnished pivots
- Concave chamfering with a diamond tool
- Circular-smoothed faces
- Rhodium plating (before cutting the teeth)
- Minimal corrections are made to the wheels to preserve their geometry and overall performance.
50 mm x 42.70 mm x 20.00 mm.
®chronoagent Luxury Montre & Car srl è una azienda italiana che vende e spedisce in tutto il Mondo orologi e gioielli, antiquariato, accessori originali a prezzi scontati, rilascia regolare fattura e certificazione di originalità