Hello everyone, I am purewatches. Today I bring you a Jaeger-LeCoultre Master Series ultra-thin two-hand semi-formal watch launched by APS factory, model number 1218420. With its simple design, ultra-thin body and exquisite craftsmanship, this watch has become a popular choice among formal watches. Whether it is a business occasion or daily wear, it can show a unique elegance. Next, we will conduct detailed evaluations in terms of appearance design, movement performance, detailed craftsmanship, etc.

1. Appearance design: simple and elegant, with exquisite details
- Case and crystal
The diameter of this watch is 39 mm, made of 316 fine steel, with a sapphire mirror, and the overall texture is excellent. At 9.2mm thick (approximately 9mm at the edges), it’s slightly thicker than the original’s 8.1mm, but barely noticeable to the naked eye. The ultra-thin design makes the watch fit better on the wrist and make it comfortable to wear. - dial design
The dial is silver-white with a slight radial pattern, showing a delicate luster under the light. The nail hour markers are slender and moderately bright, with a classic two-and-a-half-hand design (hour hand, minute hand and small second hand). The overall style is simple yet elegant. The small seconds dial at six o’clock is exquisitely designed, adding a touch of agility to the watch. - Strap and buckle
The new watch is equipped with a quick-release strap system. The original version uses an alligator leather strap, while the APS factory uses a calfskin strap, which is soft and comfortable. If you are looking for a higher-end quality, you can replace it with an alligator leather strap. The watch buckle is a new folding buckle, which is easy to operate and more stable when worn.

2. Movement and functions: stable and precise, excellent performance
- Movement configuration
The APS factory equipped this watch with the 896 integrated movement instead of the modified version of the 9015 movement that is common on the market. The design of the integrated movement makes the wheelbase and wheelbase of the watch more accurate and the overall performance more stable. - Functional experience
The function of the watch is very simple and practical. After the crown is pulled out, there is only one gear for adjusting the time, and there is no calendar idle gear. The small seconds dial is located at six o’clock, perfectly matching the hour and minute hands, making reading clear and intuitive. Thanks to the design of the integrated movement, the position of the small seconds dial is exactly the same as the original version, avoiding the common offset problem of the 9015 movement.

3. Detailed craftsmanship: Strive for excellence and highlight quality
- Engraving and polishing
The engraving on the back of the case is clear and neat, and the details are handled very well. The edges of the nail hour markers are finely polished and extremely glossy, complementing the radial pattern of the dial. - Mirror finish
The mirror surface is not coated with blue film, maintaining a pure sense of transparency. When paired with the silver-white dial, it presents a low-key sense of luxury. - Fluorescence effect
The dial has a slight fluorescent effect, which can still be read clearly in dark light environments, taking into account both practicality and aesthetics.



4. Summary: APS Manufacture Jaeger-LeCoultre Master Watch – a cost-effective choice for formal watches
This Jaeger-LeCoultre Master Series ultra-thin two-and-a-half-hand watch launched by the APS factory shows a very high level in terms of appearance design, movement performance and detailed craftsmanship. Although the thickness is slightly thicker than the original version, the overall wearing experience is still excellent. For those who are looking for formal watches, this watch is undoubtedly a very cost-effective choice. Simple but not simple, refined but not exaggerated, it perfectly interprets the charm of a formal watch.
