Seiko Cal. 6637 - 945

The Seiko 6637-945 represents an important milestone in Seiko's 1965 lineup. Powered by the 6637 caliber with 32j jewels beating at 21,600 bph, it delivers a 39 hours power reserve. [seikata-wm-1a034dd0e94d]

Also known as: Baby Tuna

Specifications

Movement

Hand-Winding

Case Material

Stainless Steel

Case Width

44mm

Case Thickness

8.3mm

Lug Width

22mm

Crystal

Mineral

Bezel

Rotating

Water Resistance

50m

Dial Color

Blue Sunburst

Jewels

32j

Frequency

21,600 bph

Power Reserve

39 hours

Year

1965

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