Seiko Cal. 5648 - 844

The Seiko 5648-844 represents an important milestone in Seiko's 1965 lineup. The Bidirectional bezel and 40mm case give it a distinctive presence on the wrist. [seikata-wm-fb7dc6bb7667]

Also known as: Tuna

Specifications

Movement

Hand-Winding

Case Material

PVD Black

Case Width

40mm

Case Thickness

9.3mm

Lug Width

20mm

Crystal

Sapphire

Bezel

Bidirectional

Water Resistance

70m

Dial Color

Green

Jewels

19j

Frequency

36,000 bph

Power Reserve

44 hours

Year

1965

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