Seiko Cal. 6310 - 637

The 6310-637 is a sought-after Automatic piece from Seiko's golden era. Powered by the 6310 caliber with 35j jewels beating at 21,600 bph, it delivers a 54 hours power reserve. [seikata-wm-d690079ef5c9]

Also known as: UFO, Sportsmatic

Specifications

Movement

Automatic

Case Material

Two-Tone

Case Width

44mm

Case Thickness

11.8mm

Lug Width

20mm

Crystal

Mineral

Bezel

Fixed

Water Resistance

100m

Dial Color

Champagne

Jewels

35j

Frequency

21,600 bph

Power Reserve

54 hours

Year

1970

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