Seiko Cal. 5641 - 311

Released in 1978, the Cal. 5641 with design code 311 was part of Seiko's domestic market collection. It features a Silver dial protected by a Mineral crystal and offers 170m of water resistance. [seikata-wm-ae8989df18bc]

Specifications

Movement

Spring Drive

Case Material

Hardlex-Coated Steel

Case Width

37mm

Case Thickness

11.3mm

Lug Width

20mm

Crystal

Mineral

Bezel

Fixed

Water Resistance

170m

Dial Color

Silver

Jewels

21j

Frequency

36,000 bph

Power Reserve

60 hours

Year

1978

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