Seiko Cal. 6621 - 331

Released in 1973, the Cal. 6621 with design code 331 was part of Seiko's domestic market collection. It features a Burgundy dial protected by a Acrylic crystal and offers 90m of water resistance. [seikata-wm-500a4cbdd672]

Also known as: UFO

Specifications

Movement

Spring Drive

Case Material

Two-Tone

Case Width

40mm

Case Thickness

12.1mm

Lug Width

18mm

Crystal

Acrylic

Bezel

Coin-Edge

Water Resistance

90m

Dial Color

Burgundy

Jewels

24j

Frequency

28,800 bph

Power Reserve

38 hours

Year

1973

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