想請問這機芯的背景如何？
是哪個eta 改的嗎？有甚麼特別之處呢？
謝謝各位大大
Caliber: Omega 2403
Free-sprung balance without index Advantage of these two elements make the Omega 2403 a high precision chronometer with a stable accuracy over long periods of use. Officially certified chronometer. Meticulous finish
Power reserve: 44 hours
