Seiko Cal. 5684 - 781

The Seiko 5684-781 represents an important milestone in Seiko's 1981 lineup. It features a Navy dial protected by a Sapphire crystal and offers 70m of water resistance. [seikata-wm-a04b07d66535]

Also known as: Helmet, Arnie

Specifications

Movement

Spring Drive

Case Material

Stainless Steel

Case Width

40mm

Case Thickness

11.5mm

Lug Width

19mm

Crystal

Sapphire

Bezel

Inner Rotating

Water Resistance

70m

Dial Color

Navy

Jewels

17j

Frequency

28,800 bph

Power Reserve

41 hours

Year

1981

Related Models

• Seiko 3826-909
• Seiko 5264-709
• Seiko 3892-340
• Seiko 7141-241
• Seiko 5662-627
• Seiko 5648-949
• Seiko 4573-598
• Seiko 5640-516
• Seiko 6381-837
• Seiko 6284-994
• Seiko 6382-269
• Seiko 3882-685