Vintage Seiko 5 Actus SS Automatic 23 Jewels Ref. 6106-8420 (November 1970) – JDM, Bilinguales Day-Date, Caliber 6106 (61GS-Verwandte Architektur) – Komplett revidiert Januar 2026 GMT and a high-contrast UTC scale

and a high-contrast UTC scale

Bezel: unidirectional rotating

Height: 19

which was used for Citizen's first water-resistant watches from the late 1950s onwards

Vintage Seiko 5 Actus SS Automatic 23 Jewels Ref. 6106-8420 (November 1970) – JDM, Bilinguales Day-Date, Caliber 6106 (61GS-Verwandte Architektur) – Komplett revidiert Januar 2026 GMT and a high-contrast UTC scaleThis Seiko 5 Actus SS Automatic 23 Jewels Ref. 6106 8420 from November 1970 is an attractive, technically and historically rich piece from the heyday of the late 1960s and early 1970s, when Seiko occupied virtually every market segment with its own, clearly positioned model family from the Seiko 5 mass segment to the premium "5 Actus" variant presented here, the Lord Matic line, and up to King Seiko and Grand Seiko. About the Seiko 5 Actus line: The