Miyota 6S21

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The Miyota 6S21 is a reliable Japanese-assembled quartz chronograph movement made by Citizen's Miyota division. [1, 2]

Key Specifications

Type: Quartz chronograph
Diameter: 15 Ligne (34.60 mm)
Thickness: 4.90 mm
Jewels: 0 jewels
Battery Life: Approximately 3 years
Accuracy: ±20 seconds per month
Date Position: Typically at 4:30 (or variations at 3/6 depending on the model dial)
Subdials: Small seconds at 3:00, 60-minute chronograph counter at 9:00

Features and Reception

Layout: It features a clean, two-register aesthetic.
Comparison: Users on Reddit generally agree that the 6S21 is superior to competing meca-quartz options like the Seiko VK64 because it offers a true running small-seconds subdial instead of an auxiliary 24-hour indicator.
Usage: Found in affordable and microbrand pilot/field chronographs (such as models from Baltany,seagull or Militado)

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