Seiko Cal. 5640 - 148

Released in 1970, the Cal. 5640 with design code 148 was part of Seiko's domestic market collection. It features a Burgundy dial protected by a Mineral crystal and offers 170m of water resistance. [seikata-wm-c53ba5035ac1]

Also known as: Tuna, Golden Tuna

Specifications

Movement

Automatic

Case Material

Stainless Steel

Case Width

38mm

Case Thickness

14.9mm

Lug Width

22mm

Crystal

Mineral

Bezel

Bidirectional

Water Resistance

170m

Dial Color

Burgundy

Jewels

33j

Frequency

28,800 bph

Power Reserve

66 hours

Year

1970

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