Seiko Cal. 5637 - 649

The 5637-649 is a sought-after Automatic piece from Seiko's golden era. It features a Champagne dial protected by a Mineral crystal and offers 150m of water resistance. [seikata-wm-a38a3ec03e3f]

Also known as: Sumo

Specifications

Movement

Automatic

Case Material

Titanium

Case Width

46mm

Case Thickness

9.7mm

Lug Width

21mm

Crystal

Mineral

Bezel

Bidirectional

Water Resistance

150m

Dial Color

Champagne

Jewels

21j

Frequency

36,000 bph

Power Reserve

59 hours

Year

1969

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