This is older than any Datsun, Nissan or KE20 that you see on the road. Infact one of the oldest Japanese made item that can be found. I have researched about this watch that it is called "center-second" and production of this watch was on May 1955. Where were you that day ?. Perfect timing. Good for daily use. You will see Tsunami effect at 3 o'clock. Size of this watch is 33mm across. I am selling for RM 290. call if interested.
Please keep in mind you are looking at vintage timepieces. Vintage and antique watches are collectibles. They need manual winding to run. These are not battery operated soulless watch; it is a living, breathing mechanical device that will have to be serviced from time to time. Some may need professional cleaning and good adjustment in order to keep accurate time. Most vintage and classic watches have an excellent performance considering of their age.