Seiko Cal. 4437 - 648

The 4437-648 is a sought-after Automatic piece from Seiko's golden era. The Inner Rotating bezel and 40mm case give it a distinctive presence on the wrist. [seikata-wm-8c93ddd1bf04]

Also known as: World Timer

Specifications

Movement

Automatic

Case Material

Two-Tone

Case Width

40mm

Case Thickness

13.0mm

Lug Width

20mm

Crystal

Mineral

Bezel

Inner Rotating

Water Resistance

60m

Dial Color

White

Jewels

26j

Frequency

21,600 bph

Power Reserve

68 hours

Year

1986

Related Models

• Seiko 5668-540
• Seiko 7177-600
• Seiko 7046-456
• Seiko 4584-526
• Seiko 7118-286
• Seiko 5643-801
• Seiko 6285-658
• Seiko 6275-330
• Seiko 5292-238
• Seiko 5226-182
• Seiko 6229-650
• Seiko 7140-429