By May 1964 the 6206 was stripped down to 26 jewels and its production simplified. It was made to be an affordable watch for the normal man, the train bound commuter in Japanese society during the mid-60s. With this in mind the watch was made until February 1967, making the 6206 one of Seiko’s better known movements.
The 6206 of course represented a significant price cut to JPY 12,500 from the JPY 15,000 of the 400 series, together with the Marvel it is probably the one with the most versions.
The 6206 caliber was produced in both A and B variants, with 6206B introduced in August 1965. The main change - other than those mentioned already - seems to be better efficiency in the day wheel function. As usual, there is both SS and goldplated cases. These also come with a number of different outer bezels both plain and more elaborate with fluted design. Most however have plain bezels. Dials can be seen in four types: half sized markers with no inner bezel, long markers with minute graded inner bezel and the blocky markers on the crosshair dial. The fourth one is a very rare type with square markers at 3, 6, 9 and 12 and a graded dial. Dials exist in white, black and silver with a number of surface treatments. The day wheel is one langauge only in English or Kanji with a blue Saturday and a red Sunday. On the dial it can be read in both framed and unframed versions, possibly with the framed version only with 6206B calibers. As mentioned earlier, branding changed from the cursive Seikomatic script and the Seikomatic logo to the printed Seikomatic text with the applied Seiko logo, in fact much more changed on the dial but it can be hard to track all revisions. One small example is the change from October to December 1964, the Gyro symbol was removed, as was the little star above the six. Apparently Seiko no longer felt any need to indicate appliqué dial with the star, or automatic with the gyro/rotor symbol. It does lead to a cleaner dial design, but maybe some of the old school charm is lost in the process?

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