Seiko Cal. 6610 - 541

This Spring Drive model from 1970 features a 37mm Hardlex-Coated Steel case. Powered by the 6610 caliber with 34j jewels beating at 21,600 bph, it delivers a 37 hours power reserve. [seikata-wm-a42e645929cc]

Also known as: Tuna, World Timer

Specifications

Movement

Spring Drive

Case Material

Hardlex-Coated Steel

Case Width

37mm

Case Thickness

9.9mm

Lug Width

20mm

Crystal

Sapphire

Bezel

Fixed

Water Resistance

80m

Dial Color

Silver

Jewels

34j

Frequency

21,600 bph

Power Reserve

37 hours

Year

1970

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