Seiko Cal. 3818 - 957

This Spring Drive model from 1991 features a 38mm Two-Tone case. Powered by the 3818 caliber with 31j jewels beating at 21,600 bph, it delivers a 40 hours power reserve. [seikata-wm-69f2fecfbe21]

Specifications

Movement

Spring Drive

Case Material

Two-Tone

Case Width

38mm

Case Thickness

10.1mm

Lug Width

20mm

Crystal

Hardlex

Bezel

Inner Rotating

Water Resistance

140m

Dial Color

Blue Sunburst

Jewels

31j

Frequency

21,600 bph

Power Reserve

40 hours

Year

1991

Related Models

• Seiko 4487-257
• Seiko 3867-131
• Seiko 6197-891
• Seiko 6635-684
• Seiko 5258-368
• Seiko 4465-609
• Seiko 6316-876
• Seiko 4457-603
• Seiko 0764-440
• Seiko 7188-685
• Seiko 7078-161
• Seiko 7072-467