Seiko Cal. 5645 - 510

The Seiko 5645-510 represents an important milestone in Seiko's 1977 lineup. Powered by the 5645 caliber with 34j jewels beating at 21,600 bph, it delivers a 70 hours power reserve. [seikata-wm-192a7c3a6506]

Also known as: Helmet, Golden Tuna

Specifications

Movement

Quartz

Case Material

Two-Tone

Case Width

43mm

Case Thickness

10.7mm

Lug Width

21mm

Crystal

Mineral

Bezel

Coin-Edge

Water Resistance

110m

Dial Color

Green

Jewels

34j

Frequency

21,600 bph

Power Reserve

70 hours

Year

1977

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