Seiko Cal. 7121 - 727

The Seiko 7121-727 represents an important milestone in Seiko's 1966 lineup. The Fixed bezel and 46mm case give it a distinctive presence on the wrist. [seikata-wm-c4e02fd90ffb]

Also known as: Bullhead, Helmet

Specifications

Movement

Automatic

Case Material

Hardlex-Coated Steel

Case Width

46mm

Case Thickness

11.3mm

Lug Width

19mm

Crystal

Mineral

Bezel

Fixed

Water Resistance

90m

Dial Color

White

Jewels

30j

Frequency

21,600 bph

Power Reserve

59 hours

Year

1966

Related Models

• Seiko 7045-724
• Seiko 3889-853
• Seiko 7158-532
• Seiko 4573-890
• Seiko 5220-370
• Seiko 5283-849
• Seiko 3891-265
• Seiko 5233-714
• Seiko 5642-314
• Seiko 4529-549
• Seiko 4491-332
• Seiko 5259-463