Seiko Cal. 5640 - 135

The 5640-135 is a sought-after Quartz piece from Seiko's golden era. It features a White dial protected by a Sapphire crystal and offers 90m of water resistance. [seikata-wm-68d1207131ec]

Also known as: Bellmatic

Specifications

Movement

Quartz

Case Material

Hardlex-Coated Steel

Case Width

39mm

Case Thickness

12.7mm

Lug Width

21mm

Crystal

Sapphire

Bezel

Bidirectional

Water Resistance

90m

Dial Color

White

Jewels

31j

Frequency

36,000 bph

Power Reserve

51 hours

Year

1994

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