Seiko Cal. 7121 - 311

This Spring Drive model from 1982 features a 37mm Titanium case. Powered by the 7121 caliber with 30j jewels beating at 21,600 bph, it delivers a 51 hours power reserve. [seikata-wm-01484dfa8fba]

Also known as: Helmet

Specifications

Movement

Spring Drive

Case Material

Titanium

Case Width

37mm

Case Thickness

9.9mm

Lug Width

18mm

Crystal

Hardlex

Bezel

Coin-Edge

Water Resistance

70m

Dial Color

Black

Jewels

30j

Frequency

21,600 bph

Power Reserve

51 hours

Year

1982

Related Models

• Seiko 7041-516
• Seiko 7117-192
• Seiko 5279-665
• Seiko 6389-384
• Seiko 6376-277
• Seiko 4451-280
• Seiko 5611-302
• Seiko 6133-265
• Seiko 7080-699
• Seiko 7125-559
• Seiko 6198-343
• Seiko 0739-293