Seiko Cal. 6640 - 375

This Spring Drive model from 1985 features a 44mm PVD Black case. It features a Cream dial protected by a Mineral crystal and offers 30m of water resistance. [seikata-wm-1bc0aefadfa0]

Also known as: Samurai, Golden Tuna

Specifications

Movement

Spring Drive

Case Material

PVD Black

Case Width

44mm

Case Thickness

13.6mm

Lug Width

20mm

Crystal

Mineral

Bezel

Coin-Edge

Water Resistance

30m

Dial Color

Cream

Jewels

35j

Frequency

36,000 bph

Power Reserve

52 hours

Year

1985

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