Automatic mechanical watch movement which is good?
In a word: Swiss movement.
The most famous is the ETA 2892A2 (ultra-thin, the movement found in many mid – to high-end watches).
ETA2824A2 is very durable and accurate. After upgrading the material of some accessories, it is no worse than 2892.
The disadvantage is a little thicker, Tissot, Dituo like to use this movement.
Throughout ETA’s history, the ETA-7750 has always been good: Originally known as the Valjoux7750, it belongs to Valjoux’s most famous timing core, and when Valjoux was acquired by ETA, the classic ValJOUx 7750 was naturally renamed the ETA-7750.
The Valjoux 7750, published in 1974, started with a 17-stone design and was later changed to a 25-stone design;
After it was acquired by ETA in the 1980s, Valjoux is now rarely used, except for movements made before the 1980s.
ETA 7750 came out on July 1, 1974, and became ETA’s proud model. It has been used for many years in various brands of autolink chronograph and complex function tables.
The STANDARD 7750 IS EQUIPPED WITH 17 RUBIES, STORING ENERGY FOR 42 HOURS, VIBRATING 28,800 TIMES PER HOUR, ADOPTING UNIDIRECTIONAL UP-CHAIN DESIGN, USING POINTER TYPE FINE-TUNING DEVICE WITH THE SAME principle AS eccentric screw, AND with scale indication FOR FINE-tuning operation.
Some say the ETA-7750 is dead wood.
I don’t know why I say so. It may be that 7750 is more general from the point of process, but one truth remains the same: simple is durable, and durable is reliable.
The ETA-7750 is one such timing movement.
Eta-7750 is a movement with one way up chain. I don’t know why ETA never changed it to two way.
Once some friends discussed, the conclusion is: “one-way than two-way has a higher chain efficiency.”
Until now it is not clear what the theoretical basis for this conclusion is.
In fact, the problem of low on-chain efficiency of the ETA-7750 is well known.
Sometimes it’s good to come up with something new, but making something out of nothing is a little embarrassing.
