Seiko Cal. 5640 - 782

Released in 1971, the Cal. 5640 with design code 782 was part of Seiko's domestic market collection. It features a Navy dial protected by a Mineral crystal and offers 170m of water resistance. [seikata-wm-0dc81c6256b3]

Also known as: Golden Tuna

Specifications

Movement

Automatic

Case Material

Two-Tone

Case Width

40mm

Case Thickness

13.3mm

Lug Width

19mm

Crystal

Mineral

Bezel

Inner Rotating

Water Resistance

170m

Dial Color

Navy

Jewels

35j

Frequency

28,800 bph

Power Reserve

58 hours

Year

1971

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