Debate over Seiko caliber 6309 case ref.# 729A F1 Suwa logo size authenticity sparks collector speculation without official confirmation. | Seiko

SEIKO caliber 6309 case ref.# 729A F1 (Slim Turtle)

SEIKO caliber 6309 case ref.# 729A F1 Black dial and Pepsi bezel The Slim Turtle case is NOT the same as the 7548 divers series, 7002 or the SKX. The Suwa Logo Size Debate - Seiko has not officially confirmed any change in logo size based on production date. One of the most debated topics among collectors is the size of the Suwa "S" logo on the dial. The Suwa logo indicates the watch was assembled at Seiko’s Suwa factory in Japan. Early production models 1982–to the mid 80's typically feature a smaller (S) Suwa logo, proportionate to the surrounding text. A small, proportionate Suwa logo increases confidence in authenticity. Some later examples majority of which are from 1987 show a larger (S) Suwa symbol next to it's surrounding text, leading to speculation about a production shift. This information though accepted by some is collector-driven .. from very proud and understandably very very very defensive owners / collectors of a watch that has the larger S on their dials and NOT from any official SEIKO documentation There is no official Seiko documentation confirming a deliberate shift from small to large Suwa logos.

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