Seiko Cal. 0721 - 436

This Solar model from 1978 features a 37mm PVD Black case. Powered by the 0721 caliber with 22j jewels beating at 28,800 bph, it delivers a 59 hours power reserve. [seikata-wm-de986516b6b1]

Also known as: Golden Tuna, Flighty

Specifications

Movement

Solar

Case Material

PVD Black

Case Width

37mm

Case Thickness

10.3mm

Lug Width

20mm

Crystal

Mineral

Bezel

Fixed

Water Resistance

150m

Dial Color

Black

Jewels

22j

Frequency

28,800 bph

Power Reserve

59 hours

Year

1978

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