Seiko Cal. 0731 - 395

This Spring Drive model from 1971 features a 36mm PVD Black case. With its 22mm lug width and 15.2mm profile, it sits comfortably on most wrists. [seikata-wm-5fd407dcd87d]

Also known as: Sumo, Bullhead

Specifications

Movement

Spring Drive

Case Material

PVD Black

Case Width

36mm

Case Thickness

15.2mm

Lug Width

22mm

Crystal

Sapphire

Bezel

Rotating

Water Resistance

120m

Dial Color

Silver

Jewels

31j

Frequency

21,600 bph

Power Reserve

40 hours

Year

1971

Related Models

• Seiko 4542-383
• Seiko 3869-493
• Seiko 6671-909
• Seiko 3840-532
• Seiko 7193-597
• Seiko 5644-940
• Seiko 6122-302
• Seiko 5211-701
• Seiko 6635-259
• Seiko 6618-529
• Seiko 6130-382
• Seiko 7096-592