Seiko Cal. 0721 - 655

The 0721-655 is a sought-after Hand-Winding piece from Seiko's golden era. It features a Black dial protected by a Sapphire crystal and offers 180m of water resistance. [seikata-wm-e1aad0a6b7f8]

Also known as: Tuna, UFO

Specifications

Movement

Hand-Winding

Case Material

PVD Black

Case Width

36mm

Case Thickness

10.0mm

Lug Width

22mm

Crystal

Sapphire

Bezel

Inner Rotating

Water Resistance

180m

Dial Color

Black

Jewels

24j

Frequency

21,600 bph

Power Reserve

66 hours

Year

1976

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