Jan 26, 2023,19:43 PM
 

What fascinates me is the small differences there are in the evolution 9 watches with a mechanical vs a spring drive calibre. The factories producing these are about 500km apart in Japan. Although at first they look identical, the cases are very very slightly different. Look at the transition between the bezel and the bracelet. Just 0,5mm or so difference there. And the crowns are different. And the indices of the mechanical evolution 9 watches have a square groove down the middle. But the spring drive versions have triangular groove down the middle. Fascinating small differences. I think because of the two different factories producing them. Which is part of the long history of Grand Seiko. Suwa vs Daini: https://www.grand-seiko.com/in-en/special/10stories/vol7/1


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Grand Seiko SLGA021 = Lake Suwa Before Dawn

 
 By: cazalea : January 26th, 2023-16:38
A five-day Spring Drive watch inspired by Lake Suwa stirred by the breeze before dawn. To the southeast of the Shinshu Watch Studio, where Spring Drive watches are made, one will find the gently lapping waters of Lake Suwa, a constant inspiration for Gran...  

 
 By: frnkvizr : January 26th, 2023-19:43
What fascinates me is the small differences there are in the evolution 9 watches with a mechanical vs a spring drive calibre. The factories producing these are about 500km apart in Japan. Although at first they look identical, the cases are very very slig... 

Good observations!

 
 By: cazalea : January 26th, 2023-23:17
The Grand Seiko website makes fascinating reading, especially for someone who hasn’t known the history of GS. And even for me, having been to those ateliers in both places.

Accuracy?

 
 By: Bluecat 128 : February 26th, 2023-18:39
Like a famous Missourian, (show me!). For ≅$10,000, prove it!

For a Spring Drive, I believe the accuracy is there - any other SD owners care to speak up?

 
 By: cazalea : February 26th, 2023-19:49
WATCHTIME "Spring Drive accordingly achieves a far more accurate rate than a mechanical escapement. Seiko calculates the average deviation at 0.5 second per day and at most, 15 seconds per month. We measured a deviation of 0.1 second per day on the wrist....