3Rs Reduce: Self-Winding Watch

When my watch with a battery stopped working, instead of replacing a new battery, I re-started to use my self-winding watch.
The wind-up watch was my first watch given by my grandfather in 1970’s. I didn’t use the watch for 30 years or so but works just fine.
I am going to use this self-winding watch so that I can reduce the amount of consumption of batteries.