Seiko Cal. 4437 - 256

This Spring Drive model from 1968 features a 39mm Gold-Plated case. It features a Burgundy dial protected by a Mineral crystal and offers 80m of water resistance. [seikata-wm-cd518d5aff0c]

Also known as: Tuna

Specifications

Movement

Spring Drive

Case Material

Gold-Plated

Case Width

39mm

Case Thickness

11.2mm

Lug Width

20mm

Crystal

Mineral

Bezel

Rotating

Water Resistance

80m

Dial Color

Burgundy

Jewels

36j

Frequency

36,000 bph

Power Reserve

63 hours

Year

1968

Related Models

• Seiko 6656-779
• Seiko 4592-656
• Seiko 4417-578
• Seiko 6363-709
• Seiko 6648-723
• Seiko 5290-208
• Seiko 6129-335
• Seiko 6618-551
• Seiko 6147-532
• Seiko 3874-846
• Seiko 6122-124
• Seiko 4571-515