SL 4802

 The Peacock SL4802 is an automatic, self-winding mechanical chronograph movement manufactured by the Peacock Watch Group in Dandong, China. It is essentially the skeletonized, undecorated sibling of the Peacock SL4801. [1, 2]

Peacock SL4802 Overview

Type: Automatic mechanical chronograph with a column wheel and vertical clutch [1, 2]
Design: Skeletonized version of the SL4801, showing the internal mechanics through the dial or caseback. [1]
Specs (Shared closely with SL4801): 28,800 bph (4 Hz) beat rate, 41 jewels, uni-directional ball-bearing rotor, and a power reserve around 55 hours. [1]
Characteristics: Known in the watch-modding and replica community as a commercial, lower-cost alternative often used in Daytona-style chronographs. Users note a distinct, louder uni-directional "helicopter" rotor spin compared to true clones. It is also not a drop-in 1:1 fit for genuine Rolex 4130 cases; builders often face clearance issues requiring modified or double-domed crystals. [1, 2, 3]

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Peacock SL4802 vs. SL4801

SL4801: The standard, non-skeletonized base automatic column wheel chronograph caliber.
SL4802: The skeletonized variant of the exact same movement family. Mechanically and dimensionally they are nearly identical, with the main difference being the open, skeletonized architecture of the SL4802. [1, 2, 3]

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Peacock SL4802 vs. Rolex Caliber 4130

Design & Architecture:
• The Rolex 4130 is a true, ground-up in-house high-efficiency movement with roughly 201 components, featuring a 72-hour power reserve, a patented Parachrom hairspring, ceramic ball-bearing winding (68% more efficient), and a single-screw adjustment for the chronograph module.
• The SL4802 is a commercial Chinese-made movement inspired loosely by the layout of the Daytona, featuring a column wheel and vertical clutch. However, it is not a true 1:1 clone of the 4130 (unlike dedicated Dandong/Shanghai 4130 clones). [1, 2, 3, 4, 5, 6]
Winding & Rotor: The SL4802 uses a uni-directional rotor (often described as sounding/feeling like a "helicopter" spin), whereas Rolex uses a high-efficiency bi-directional/ball-bearing system. [1, 2, 3]
Power Reserve: SL4802 provides roughly 55 hours, whereas the Rolex 4130 delivers 72 hours. [1, 2, 3]
Build/Compatibility: While marketed as a Daytona-style alternative, the SL4802 is thicker or has different hand/crystal clearance requirements, meaning it does not simply drop into a genuine 4130 case without modification

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