Since the second hand came off and the watch stopped, I had a watch repair shop in Japan look at it, but the watch still stopped even after the second hand was put back in place.
The watchmaker said he couldn't fix this.
They said it was strange that the second hand came off during normal use, and that it might be a defective product.
I just bought it in November last year, and even if I drop it, I haven't used it roughly.
Replace if defective
Please take the shipping fee with you.