Seiko Cal. 5688 - 521

Released in 1972, the Cal. 5688 with design code 521 was part of Seiko's domestic market collection. It features a Silver dial protected by a Mineral crystal and offers 150m of water resistance. [seikata-wm-1119de77da5d]

Also known as: Bullhead

Specifications

Movement

Hand-Winding

Case Material

PVD Black

Case Width

38mm

Case Thickness

12.7mm

Lug Width

19mm

Crystal

Mineral

Bezel

Rotating

Water Resistance

150m

Dial Color

Silver

Jewels

20j

Frequency

28,800 bph

Power Reserve

63 hours

Year

1972

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