Seiko Cal. 6645 - 435

The Seiko 6645-435 represents an important milestone in Seiko's 1980 lineup. The Coin-Edge bezel and 38mm case give it a distinctive presence on the wrist. [seikata-wm-180c3eb4e0d4]

Also known as: Bullhead

Specifications

Movement

Automatic

Case Material

Hardlex-Coated Steel

Case Width

38mm

Case Thickness

13.9mm

Lug Width

22mm

Crystal

Acrylic

Bezel

Coin-Edge

Water Resistance

100m

Dial Color

Green

Jewels

26j

Frequency

28,800 bph

Power Reserve

50 hours

Year

1980

Related Models

• Seiko 4442-386
• Seiko 4518-995
• Seiko 0742-701
• Seiko 7143-116
• Seiko 5630-649
• Seiko 6236-832
• Seiko 6218-887
• Seiko 7180-411
• Seiko 6175-804
• Seiko 6255-414
• Seiko 6243-741
• Seiko 5683-392