- End stone cap with concave bottom
This concave hole serves as a dedicated micro oil reservoir for storing watch oil, which forms a more durable oil film on the end face of the balance staff, reducing wear and oil loss during high frequency rotation.
- Mainly suitable for high-frequency, high-precision, mid-to-high-end mechanical movements
- Especially those with an oscillation frequency of = 36,000 vph (5 Hz)
- Also for chronometer-certified or complicated function movements with stringent requirements for lubrication and stability
For calibres including:
Rolex 3235/3255, Omega 8900/9900, TAG Heuer Heuer 02, Breitling B01, Longines L888.4, Tudor MT5621, Glashütte Original 36-01, Breguet 5177, Omega Master Chronometer, Rolex Superlative Chronometer, Zenith El Primero 400B, Jaeger-LeCoultre Cal.978, IWC 69385, Blancpain 1315, A. Lange & Söhne L1923, Beijing Watch B18, Seagull ST25 High-Frequency Version, Glashütte Original Senator Chronograph
