Seiko Cal. 4442 - 721

The Seiko 4442-721 represents an important milestone in Seiko's 1966 lineup. It features a Green dial protected by a Hardlex crystal and offers 180m of water resistance. [seikata-wm-d2a7b19be2b2]

Specifications

Movement

Spring Drive

Case Material

Two-Tone

Case Width

42mm

Case Thickness

14.2mm

Lug Width

22mm

Crystal

Hardlex

Bezel

Fixed

Water Resistance

180m

Dial Color

Green

Jewels

35j

Frequency

28,800 bph

Power Reserve

67 hours

Year

1966

Related Models

• Seiko 5286-286
• Seiko 6645-846
• Seiko 0765-254
• Seiko 3829-565
• Seiko 6226-101
• Seiko 6277-145
• Seiko 7120-289
• Seiko 7037-277
• Seiko 6615-189
• Seiko 7026-526
• Seiko 5628-110
• Seiko 5693-617