Seiko Cal. 5657 - 136

Released in 1965, the Cal. 5657 with design code 136 was part of Seiko's domestic market collection. It features a Black dial protected by a Mineral crystal and offers 130m of water resistance. [seikata-wm-c60bf81019d8]

Also known as: Sportsmatic, Baby Tuna

Specifications

Movement

Spring Drive

Case Material

Gold-Plated

Case Width

34mm

Case Thickness

11.0mm

Lug Width

22mm

Crystal

Mineral

Bezel

Inner Rotating

Water Resistance

130m

Dial Color

Black

Jewels

34j

Frequency

36,000 bph

Power Reserve

49 hours

Year

1965

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