Seiko Cal. 5251 - 100

The 5251-100 is a sought-after Hand-Winding piece from Seiko's golden era. Powered by the 5251 caliber with 29j jewels beating at 21,600 bph, it delivers a 55 hours power reserve. [seikata-wm-4a8b9b2a2f4f]

Also known as: Baby Tuna

Specifications

Movement

Hand-Winding

Case Material

Stainless Steel

Case Width

37mm

Case Thickness

15.0mm

Lug Width

21mm

Crystal

Sapphire

Bezel

Inner Rotating

Water Resistance

110m

Dial Color

Burgundy

Jewels

29j

Frequency

21,600 bph

Power Reserve

55 hours

Year

1977

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