Seiko Cal. 6321 - 543

The 6321-543 is a sought-after Automatic piece from Seiko's golden era. Powered by the 6321 caliber with 18j jewels beating at 28,800 bph, it delivers a 43 hours power reserve. [seikata-wm-812701996e4d]

Also known as: Tuna

Specifications

Movement

Automatic

Case Material

Two-Tone

Case Width

37mm

Case Thickness

15.2mm

Lug Width

21mm

Crystal

Sapphire

Bezel

Bidirectional

Water Resistance

170m

Dial Color

Champagne

Jewels

18j

Frequency

28,800 bph

Power Reserve

43 hours

Year

1971

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