Seiko Cal. 6621 - 327

The Seiko 6621-327 represents an important milestone in Seiko's 1976 lineup. Powered by the 6621 caliber with 33j jewels beating at 21,600 bph, it delivers a 60 hours power reserve. [seikata-wm-39ecd603c14b]

Also known as: Helmet, Bellmatic

Specifications

Movement

Solar

Case Material

Two-Tone

Case Width

44mm

Case Thickness

15.8mm

Lug Width

21mm

Crystal

Sapphire

Bezel

Bidirectional

Water Resistance

140m

Dial Color

Cream

Jewels

33j

Frequency

21,600 bph

Power Reserve

60 hours

Year

1976

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