Seiko Cal. 6621 - 677

Released in 1968, the Cal. 6621 with design code 677 was part of Seiko's domestic market collection. It features a Silver dial protected by a Hardlex crystal and offers 150m of water resistance. [seikata-wm-e07f98603f26]

Also known as: Tuna

Specifications

Movement

Spring Drive

Case Material

Two-Tone

Case Width

40mm

Case Thickness

11.1mm

Lug Width

19mm

Crystal

Hardlex

Bezel

Inner Rotating

Water Resistance

150m

Dial Color

Silver

Jewels

19j

Frequency

21,600 bph

Power Reserve

60 hours

Year

1968

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