Seiko Cal. 6131 - 661

Released in 1968, the Cal. 6131 with design code 661 was part of Seiko's domestic market collection. It features a Navy dial protected by a Sapphire crystal and offers 150m of water resistance. [seikata-wm-5ca63499ccc9]

Specifications

Movement

Hand-Winding

Case Material

Stainless Steel

Case Width

35mm

Case Thickness

11.6mm

Lug Width

22mm

Crystal

Sapphire

Bezel

Rotating

Water Resistance

150m

Dial Color

Navy

Jewels

24j

Frequency

36,000 bph

Power Reserve

56 hours

Year

1968

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