Seiko Cal. 5687 - 401

This Hand-Winding model from 1975 features a 40mm Two-Tone case. It features a White dial protected by a Sapphire crystal and offers 170m of water resistance. [seikata-wm-67f387c7d806]

Also known as: Helmet, Baby Tuna

Specifications

Movement

Hand-Winding

Case Material

Two-Tone

Case Width

40mm

Case Thickness

11.8mm

Lug Width

22mm

Crystal

Sapphire

Bezel

Fixed

Water Resistance

170m

Dial Color

White

Jewels

18j

Frequency

28,800 bph

Power Reserve

41 hours

Year

1975

Related Models

• Seiko 6674-568
• Seiko 3880-507
• Seiko 0711-708
• Seiko 5672-379
• Seiko 6319-189
• Seiko 4586-330
• Seiko 0729-305
• Seiko 7033-542
• Seiko 0772-297
• Seiko 6675-563
• Seiko 6336-384
• Seiko 6273-731