Seiko Cal. 4427 - 763

The Seiko 4427-763 represents an important milestone in Seiko's 1977 lineup. It features a Blue Sunburst dial protected by a Hardlex crystal and offers 60m of water resistance. [seikata-wm-452fe756902b]

Also known as: Bullhead, Arnie

Specifications

Movement

Spring Drive

Case Material

Two-Tone

Case Width

41mm

Case Thickness

14.4mm

Lug Width

22mm

Crystal

Hardlex

Bezel

Coin-Edge

Water Resistance

60m

Dial Color

Blue Sunburst

Jewels

28j

Frequency

36,000 bph

Power Reserve

66 hours

Year

1977

Related Models

• Seiko 0757-245
• Seiko 4597-993
• Seiko 5651-321
• Seiko 6353-643
• Seiko 6662-104
• Seiko 6223-918
• Seiko 7064-636
• Seiko 7124-818
• Seiko 5624-238
• Seiko 6265-441
• Seiko 6340-244
• Seiko 6396-141