In 2000, Rolex launched the self-developed and manufactured calibre 4130. The quantity of components of Cal.4130 is 60% reduced than the previous Cal.4040. It simplifies the minute and hour system and integrates it, being placed on the side of the movement by eccentric cross-connect. The technology saves the interior of the movement and allows for the assembly of larger mainsprings, which increases the power reserve from 50 hours to 72 hours.
It is worthy of mentioning that Cal.4130 which has owned several patents doesn’t use the transverse cross link, instead, it has been equipped with vertical cross connection device. The hairspring of Rolex Daytona knockoff watches with self-winding mechanical movement offer greater resistance to the magnetism, shocking and temperature variations.
The perfect Rolex fake watches of Daytona have attracted numerous watch lovers and even many professional racing drivers. Cal.4130 is exactly a chronograph movement that completely developed and manufactured by Rolex, ensuring the great reliability and durability.