What is the movement of Longines A31L01 V8XV47?

This is the Aita movement, which is very delicately made. There is no fast and slow needle, and the rose on the pendulum is adjusted fast and slow. It's a good walk, and the error is not big.

Summary. At present, the movements of the world's top ten famous watches, such as TONTON, Longqin, Patek Philippe, Rolex, Longqin, Tissot, Rado, Abby, IWC, Cartier, Giga, Baoji, Piaget and other Swiss watch brands, all use the ETA2750 movement. If there is a slight change in individual parts or the addition of additional devices, when it is necessary to change the model, the front is still ETA27, and only the last two digits are changed, such as ETA2752, ETA2783, ETA2789, etc.2.

The first symbol of the movement code of the table is the code of "table", and "s" is the first letter of the pinyin alphabet of the word "hand". For mechanical watches produced in China after 1965, the first letter of the movement model number is "S". The second symbol is "factory" ** "s" is the first letter of the word "Shang" in pinyin, representing "Shanghai Watch Factory", "t" is the first letter of the word "day", representing "Swiss factory" "C" is the first letter of "in" in Chinese pinyin, and the third symbol is the serial number of the manufacturer's product.

What is the movement code of the Longines L4+709+4.

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The back cover of the watch is L4 709 4, what is the code on the movement when the back cover is opened?

The easiest and most straightforward way is to display the model of Longines on the back cover of the watch. But only a portion of it is shown. For the complete number comma, you need to inquire about the corresponding warranty card.

The model number of a Longines watch is indicated by a series of numbers on the back cover of the watch and on the warranty card, in the format Yu sold as La BCD e stands for the brand, the first letter of Longines; a for series; b represents the size; e stands for case material; f represents the dial color; g stands for clock indication; h stands for bracelet. Clear.

At present, the movements of the world's top ten famous watches, such as TONTON, Longqin, Patek Philippe, Rolex, Longqin, Tissot, Rado, Abby, IWC, Cartier, Giga, Baoji, Piaget and other Swiss watch brands, all use the ETA2750 movement. If there is a slight change in individual parts or the addition of additional devices, when it is necessary to change the model, the front is still ETA27, and only the last two digits change the number of slags, such as ETA2752, ETA2783, ETA2789, etc.2. The first symbol of the movement code of the table is the code of "table", and "s" is the first letter of the pinyin alphabet of the word "hand".

For mechanical watches produced in China after 1965, the first letter of the movement model number is "S". The second symbol is "factory" ** "s" is the first letter of the word "Shang" in pinyin, representing "Shanghai Watch Factory", "T" is the first letter of the word "Tian", representing "Swiss factory" "C" is the first letter of "in" in Chinese pinyin, and the third symbol is the serial number of the product of the manufacturing of Tuchang Quiet Merchant.

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**The above watch is an old Longines Master Craftsman mechanical men's watch (picture 1 below), which uses the L602 calibre automatic movement based on the ETA2897 and re-polished (picture 2 below). The old model has long been discontinued, and now it is sold as the ** type as shown in Figure 3 below), and the official unified sales price in China is 17,500 yuan.