Why does Spring Drive do this? Grand Seiko 🤔 #shorts

Posted on by pikakichi2015@gmail.com
Estimated read time 1 min read

Here’s a little secret on Grand Seiko Spring Drive models! Spring Drive had an incredible daily accuracy of +1 / -1 second per day.

Watch featured: Grand Seiko SBGA387 Kirazuri USA Limited Edition 💠

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