Seiko Cal. 5641 - 350

Released in 1986, the Cal. 5641 with design code 350 was part of Seiko's domestic market collection. It features a Blue Sunburst dial protected by a Mineral crystal and offers 50m of water resistance. [seikata-wm-bd583dc06dc0]

Also known as: Helmet

Specifications

Movement

Hand-Winding

Case Material

Stainless Steel

Case Width

43mm

Case Thickness

10.3mm

Lug Width

20mm

Crystal

Mineral

Bezel

Coin-Edge

Water Resistance

50m

Dial Color

Blue Sunburst

Jewels

23j

Frequency

28,800 bph

Power Reserve

58 hours

Year

1986

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