My dearest 62Grand Seiko Day and Date
Grand Seiko Diashock Automatic Caliber 6246-9001: This is one of the rarest Grand Seiko. A total number of 19,800 pieces were produced at that time. It is highly sought after in Japan and according to a reliable source, it can fetch as high as 200,000 Yen (about US$ 2000) for one in mint condition. Another variant of this watch is Caliber 6245 which only carries date function. (Abstract from: Dr. Wayne Lee)
This 6246 was produced on 1966 at Suwa Seikosha and was the second "GS" automatic model. 6246 was originally sold as a Seikomatic Chronometer but because of Chronometer appeal, the name was changed to 62Grand Seiko. Therefore, 6246A movement has Seiko internal GS standard official approval.
6246A movement has 39 jewels and has slow amplitude of 19800 beats per hour. Compared to other GSs, there were differences in the position of crown and case design. Because only a few were produced, so it is difficult to find one in good working condition today. Glad that I have both 6245 and 6246 in my collection now.