Seiko Cal. 4427 - 436

The 4427-436 is a sought-after Automatic piece from Seiko's golden era. It features a Black dial protected by a Sapphire crystal and offers 160m of water resistance. [seikata-wm-74de81bf9cd9]

Also known as: Navigator, Baby Tuna

Specifications

Movement

Automatic

Case Material

Hardlex-Coated Steel

Case Width

43mm

Case Thickness

9.4mm

Lug Width

22mm

Crystal

Sapphire

Bezel

Rotating

Water Resistance

160m

Dial Color

Black

Jewels

27j

Frequency

36,000 bph

Power Reserve

43 hours

Year

1972

Related Models

• Seiko 5616-333
• Seiko 7176-350
• Seiko 4551-527
• Seiko 6116-612
• Seiko 4446-260
• Seiko 4544-543
• Seiko 5678-916
• Seiko 7013-667
• Seiko 7129-871
• Seiko 3841-622
• Seiko 4587-958
• Seiko 0744-724