Seiko Cal. 5611 - 647

The 5611-647 is a sought-after Hand-Winding piece from Seiko's golden era. It features a Navy dial protected by a Mineral crystal and offers 100m of water resistance. [seikata-wm-bce01a171e32]

Also known as: Helmet

Specifications

Movement

Hand-Winding

Case Material

Hardlex-Coated Steel

Case Width

41mm

Case Thickness

11.9mm

Lug Width

19mm

Crystal

Mineral

Bezel

Rotating

Water Resistance

100m

Dial Color

Navy

Jewels

17j

Frequency

28,800 bph

Power Reserve

66 hours

Year

1966

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