Seiko Cal. 7138 - 523

This Hand-Winding model from 1977 features a 35mm Titanium case. Powered by the 7138 caliber with 33j jewels beating at 21,600 bph, it delivers a 49 hours power reserve. [seikata-wm-ab3a4639d6f2]

Also known as: Navigator, Crown

Specifications

Movement

Hand-Winding

Case Material

Titanium

Case Width

35mm

Case Thickness

15.1mm

Lug Width

20mm

Crystal

Mineral

Bezel

Coin-Edge

Water Resistance

60m

Dial Color

White

Jewels

33j

Frequency

21,600 bph

Power Reserve

49 hours

Year

1977

Related Models

• Seiko 4431-645
• Seiko 5211-964
• Seiko 6252-955
• Seiko 6640-312
• Seiko 6232-628
• Seiko 0768-358
• Seiko 0772-384
• Seiko 5295-359
• Seiko 3857-110
• Seiko 6134-280
• Seiko 6236-128
• Seiko 3870-686