The Vacheron Constantin Royal Eagle Chronograph (Reference 49145) is a luxury, discontinued high-horology timepiece featuring a distinctive tonneau-shaped case, an automatic column-wheel chronograph movement, and a prominent big date display. Melding early 20th-century Art Deco design cues with early 2000s sporting luxury, it remains a highly sought-after, distinctive statement piece on the secondary market.
  The standout feature of the Royal Eagle 49145 is its Art Deco-inspired tonneau (barrel) shaped case. The case is accented by heavily stepped, fluted lugs that give the watch a aggressive yet elegant geometric profile on the wrist.
  The silvered dial balances complex layout geometry with absolute symmetry: 

• The Big Date: Positioned right below the 12 o'clock marker inside a double-aperture display window.

• The Sub-Dials: Traditional tri-compax arrangement with a 30-minute counter at 3 o'clock, a 12-hour counter at 9 o'clock, and a running sub-seconds hand at 6 o'clock.

• Numerals: Features oversized, stylized painterly black Arabic or crisp Roman numerals that follow the dramatic curve of the tonneau frame.

• Beneath the solid caseback sits the Vacheron Constantin Caliber 1137. This is an elite integrated automatic chronograph movement based closely on the legendary Frédéric Piguet 1185 ebauche. Instead of relying on a modular add-on or a simpler cam-actuated system, the Caliber 1137 employs a premium column wheel and vertical clutch system. This architecture ensures that when you depress the rectangular chronograph pushers, the mechanical engagement is smooth and crisp, eliminating any initial "jump" or stutter of the central seconds hand. The movement is meticulously hand-finished by Vacheron Constantin with classic Côtes de Genève (Geneva stripes) and perlage on the plates.