The difference between the 2500 movement and the 8500 movement is as follows:
1. The 2500 movement is a one-way automatic winding (winding efficiency is relatively low); the 8500 movement is a two-way automatic winding. Winding (winding is stable).
2. There is only one barrel inside the 2500 movement, with a power reserve of 48 hours; there are two series barrels inside the 8500 movement, with a power reserve of more than 60 hours.
3. There are 27 ruby ??bearings in the 2500 movement; 39 in the 8500 movement.
4. The 2500 movement has a 3-year warranty; the 8500 movement has a 4-year warranty.
The maintenance period of 5.2500 movement is 5-6 years; the maintenance period of 8500 movement is 8-10 years.
The 2500 movement is the original ETA movement that has been improved by Omega. It has applied for a patent and is divided into 2500A, 2500B, 2500C, and now 2500D. Due to the widespread use of the 2500 movement at the beginning The phenomenon of stolen parking has been criticized by the industry, but after many improvements, it has become relatively complete and stable.
The 8500 movement is a movement independently developed by Omega. It is a milestone movement of Omega. There are many Swiss watch brands, but only about two dozen have the ability to produce their own movements.
Extended information:
1. History of Omega 2500 movement
In 1999, OMEGA launched the Omega 2500 movement with a coaxial escapement system. It has attracted the attention of the entire mechanical watchmaking industry. The OMEGA coaxial escapement system installed in the watch movement is the first new escapement system with high application performance in two and a half centuries. This system can reduce friction and energy between escapement system components. consumption, and combined with the card-free hairspring balance wheel to maintain the accuracy and stability of the movement for a long time, so the watch almost does not need to add lubricating oil. As a result, the Omega 2500 movement equipped with a coaxial escapement system has also become one of the important inventions in the mechanical watch industry in the 20th century.
2. Introduction to Omega 8500 movement
Omega launched the 8500/8501 coaxial movement in 2007. The 202 parts of each movement are made by Omega with the most advanced technology. The technology is fully developed and manufactured by ourselves. The movement manufacturing procedures are optimized for serial number production. The timing performance of the Omega 8500/8501 movement has attracted much attention in the mechanical watch industry.
For Omega, this is a return to its roots. In fact, the brand name also comes from its self-developed and mass-produced movement in 1890. The launch of the 8500 coaxial movement once again proves that Omega adheres to the fine tradition and spirit of the Swiss watchmaking industry to develop, design and manufacture movements by itself.
With the birth of the 8520/8521 coaxial movement specially designed for small watches, and the 8601/8611 coaxial movement that added the instantaneous jump annual calendar complication, the development of coaxial movement Keep changing.
The new generation of 8500/8501 coaxial movements and these coaxial movements are equipped with Omega Si 14 silicon hairspring. This outstanding research and development can effectively protect against shocks and environmental interference. This ensures that the watch keeps accurate time. In addition, Omega, Rolex, and Bulgari provide up to four years of maintenance services for watches equipped with exclusive coaxial movement and silicon hairspring combinations.
Reference: Baidu Encyclopedia—Omega