Seiko Cal. 4521 - 636

The 4521-636 is a sought-after Quartz piece from Seiko's golden era. It features a Green dial protected by a Mineral crystal and offers 50m of water resistance. [seikata-wm-8c16920c51d8]

Also known as: Monster, Tuna

Specifications

Movement

Quartz

Case Material

Two-Tone

Case Width

45mm

Case Thickness

10.3mm

Lug Width

18mm

Crystal

Mineral

Bezel

Rotating

Water Resistance

50m

Dial Color

Green

Jewels

22j

Frequency

36,000 bph

Power Reserve

36 hours

Year

1999

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