Seiko Cal. 6137 - 639

The Seiko 6137-639 represents an important milestone in Seiko's 1978 lineup. Powered by the 6137 caliber with 30j jewels beating at 36,000 bph, it delivers a 45 hours power reserve. [seikata-wm-25933e68f39c]

Also known as: Turtle

Specifications

Movement

Hand-Winding

Case Material

PVD Black

Case Width

46mm

Case Thickness

13.3mm

Lug Width

20mm

Crystal

Sapphire

Bezel

Rotating

Water Resistance

90m

Dial Color

Navy

Jewels

30j

Frequency

36,000 bph

Power Reserve

45 hours

Year

1978

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