Seiko Cal. 7028 - 831

This Hand-Winding model from 1973 features a 44mm Two-Tone case. Powered by the 7028 caliber with 25j jewels beating at 36,000 bph, it delivers a 42 hours power reserve. [seikata-wm-da601f0abf33]

Also known as: Bullhead, World Timer

Specifications

Movement

Hand-Winding

Case Material

Two-Tone

Case Width

44mm

Case Thickness

12.0mm

Lug Width

21mm

Crystal

Acrylic

Bezel

Fixed

Water Resistance

120m

Dial Color

White

Jewels

25j

Frequency

36,000 bph

Power Reserve

42 hours

Year

1973

Related Models

• Seiko 3873-484
• Seiko 4547-167
• Seiko 5228-584
• Seiko 6273-524
• Seiko 3869-704
• Seiko 5616-266
• Seiko 4485-801
• Seiko 5645-678
• Seiko 6382-248
• Seiko 4413-578
• Seiko 4486-258
• Seiko 7134-844