Cartier Barrel Complete For Caliber 1904

Quantity	Discount (%)	Price
1 - 2	—	$185.00
3 - 4	5 %	$175.75
5 - 9	7 %	$172.05
10 - 14	10 %	$166.50
15+	15 %	$157.25

Quantity

Discount (%)

Price

1 - 2

—

$185.00

3 - 4

5 %

$175.75

5 - 9

7 %

$172.05

10 - 14

10 %

$166.50

15+

15 %

$157.25

Product Description

This is a genuine Swiss-made Cartier barrel complete for the Caliber 1904 MC, a pre-assembled unit containing the twin mainspring barrels, arbors, and mainsprings. Launched in 2010, the 1904 MC was Cartier‘s first fully in‑house automatic movement. The caliber is named after 1904—the year Cartier created the world’s first modern wristwatch, the Santos.

Measuring 25.6mm in diameter (11½‴) and beating at 28,800 vph (4 Hz), the movement consists of 186 parts and features a practical 48‑hour power reserve enabled by its twin‑barrel system—one of its most distinctive engineering signatures. This genuine OEM barrel assembly is the direct replacement for a worn or aged original, delivering the same 48‑hour power reserve and stable torque that define the caliber‘s performance.

Features & Function

Genuine Quality: Factory‑produced by Cartier‘s Manufacture at La Chaux‑de‑Fonds, Switzerland. Brand new, with materials and precision fully compliant with the movement’s original design standards. Launched in 2010, the 1904 MC represented Cartier‘s first steps toward fully in-house movement production.

Compatible Movement: Cartier Caliber 1904 MC (and its derivatives such as 1904‑PS MC, 1904‑CH MC). Diameter 25.6 mm, thickness 4 mm, 186 total components.

Part Number: Genuine Cartier OEM part. Refer to the official parts catalog.

Twin‑Barrel System: The caliber’s most prominent technical feature. Two mainspring barrels work in parallel to store energy, delivering a stable 48‑hour power reserve while improving torque consistency, especially during the latter part of the reserve period.

Bidirectional “Magic Lever“ Winding: The ratchet‑type (Magic Lever) automatic winding system replaces traditional reversing wheels. It captures energy from the oscillating weight in both directions, significantly improving winding efficiency so that the twin barrels are effectively charged even with minimal wrist motion.

Anti‑Magnetic Protection: A paramagnetic alloy shield integrated with the case protects the movement from everyday magnetic fields, ensuring the mainspring‘s torque output remains unaffected.

Assembly Advantage: This barrel complete arrives as a pre‑assembled unit (drums, arbors, and mainsprings pre‑installed), eliminating the need to manually handle or install the delicate mainsprings, reducing service risk and ensuring perfect fit.

Single‑Use Principle: The barrel complete is a wear‑and‑tear component. Once installed and run, it should not be reused. Any disassembly introduces micro‑deformations that lead to increased risk of future failure.

FAQ

Q1: What is the difference between a “barrel complete” and a loose mainspring?
A: A barrel complete is a pre‑assembled unit (drum, arbor, and mainspring). The 1904 MC uses a matched pair of barrels; simply replacing the bare mainspring in one barrel will alter the torque balance between the two. Installing an unmatched mainspring can lead to irregular power delivery and reduced reserve.

Q2: Can I replace only one barrel instead of both?
A: No. Because the two barrels in the 1904 MC are mechanically linked by an intermediate wheel, mismatched elasticity between an old spring and a new spring will create an uneven torque curve. This asymmetrical loading will cause faster wear on the intermediate teeth and can actually reduce the power reserve. Always replace the complete set of two barrels.

Q3: How do I know the correct pre‑wind direction for the twin barrels?
A: New barrel completes are factory‑pre‑wound. Simply place them into their designated positions on the mainplate. The intermediate wheel coupling the two barrels should spin freely. If the orientation is reversed with respect to the intermediate wheel, the automatic module may not drive the train correctly.

Q4: Why must I check the amplitude after installing a new barrel complete?
A: The amplitude at full wind (target 270°–310°) directly indicates whether the new barrels are delivering the correct torque. Low amplitude (e.g., <250°) points to a lubrication or pre‑wind issue. A timing machine check is essential for verifying installation quality.