Seiko Cal. 6658 - 504

The Seiko 6658-504 represents an important milestone in Seiko's 1978 lineup. Powered by the 6658 caliber with 19j jewels beating at 36,000 bph, it delivers a 50 hours power reserve. [seikata-wm-370c098d879b]

Also known as: Baby Tuna

Specifications

Movement

Solar

Case Material

PVD Black

Case Width

36mm

Case Thickness

14.2mm

Lug Width

18mm

Crystal

Hardlex

Bezel

Rotating

Water Resistance

90m

Dial Color

Silver

Jewels

19j

Frequency

36,000 bph

Power Reserve

50 hours

Year

1978

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