Seiko Cal. 4427 - 317

This Spring Drive model from 1975 features a 39mm Titanium case. It features a Silver dial protected by a Mineral crystal and offers 40m of water resistance. [seikata-wm-b83e5f0a0c7c]

Also known as: Helmet, Flighty

Specifications

Movement

Spring Drive

Case Material

Titanium

Case Width

39mm

Case Thickness

15.2mm

Lug Width

19mm

Crystal

Mineral

Bezel

Coin-Edge

Water Resistance

40m

Dial Color

Silver

Jewels

21j

Frequency

36,000 bph

Power Reserve

38 hours

Year

1975

Related Models

• Seiko 7185-352
• Seiko 4585-326
• Seiko 6196-645
• Seiko 7164-593
• Seiko 5691-657
• Seiko 5621-482
• Seiko 3831-626
• Seiko 4511-501
• Seiko 6270-836
• Seiko 6119-318
• Seiko 5218-491
• Seiko 3881-280