Seiko Cal. 5613 - 756

This Hand-Winding model from 1972 features a 40mm Stainless Steel case. Powered by the 5613 caliber with 29j jewels beating at 36,000 bph, it delivers a 49 hours power reserve. [seikata-wm-c32df7ce47ff]

Also known as: UFO, Baby Tuna

Specifications

Movement

Hand-Winding

Case Material

Stainless Steel

Case Width

40mm

Case Thickness

13.8mm

Lug Width

20mm

Crystal

Mineral

Bezel

Inner Rotating

Water Resistance

160m

Dial Color

Green

Jewels

29j

Frequency

36,000 bph

Power Reserve

49 hours

Year

1972

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