Seiko Cal. 6620 - 631

Released in 1992, the Cal. 6620 with design code 631 was part of Seiko's domestic market collection. It features a Navy dial protected by a Mineral crystal and offers 160m of water resistance. [seikata-wm-c8f843784e5c]

Also known as: World Timer, Emperor

Specifications

Movement

Spring Drive

Case Material

PVD Black

Case Width

46mm

Case Thickness

13.2mm

Lug Width

21mm

Crystal

Mineral

Bezel

Bidirectional

Water Resistance

160m

Dial Color

Navy

Jewels

33j

Frequency

36,000 bph

Power Reserve

40 hours

Year

1992

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