This was a 10-speed, pretty much all steel except for the handlebar stem and the In 1977 it was upgraded to 12-speed, and later the name was changed to S12-S. diameter and are found mostly on older and lower-quality Japanese bicycles. .. These were very well-made, lugged-frame bikes, but of somewhat dated
Rules for Japanese Emperor Date Calendar. Imperial dates are formatted with the name of the era followed by year, month, and day. So the first year of the MEIJI era entirely over-laps with the last year of KEIO (or KEIO 4). the throne in about 660 B.C. Japan's is the world's oldest existing hereditary monarchy.