Seiko Cal. 4420 - 634

This Solar model from 1973 features a 40mm Titanium case. The Coin-Edge bezel and 40mm case give it a distinctive presence on the wrist. [seikata-wm-e540bb83ba1c]

Also known as: Golden Tuna

Specifications

Movement

Solar

Case Material

Titanium

Case Width

40mm

Case Thickness

11.5mm

Lug Width

22mm

Crystal

Acrylic

Bezel

Coin-Edge

Water Resistance

70m

Dial Color

Silver

Jewels

26j

Frequency

28,800 bph

Power Reserve

36 hours

Year

1973

Related Models

• Seiko 4464-415
• Seiko 6373-857
• Seiko 4497-922
• Seiko 5256-478
• Seiko 6318-325
• Seiko 4572-774
• Seiko 4526-317
• Seiko 0752-638
• Seiko 7145-416
• Seiko 3894-593
• Seiko 4463-719
• Seiko 5697-514