Seiko Cal. 3813 - 991

The Seiko 3813-991 represents an important milestone in Seiko's 1991 lineup. It features a Navy dial protected by a Sapphire crystal and offers 110m of water resistance. [seikata-wm-bb23dfe6e650]

Also known as: Bellmatic

Specifications

Movement

Hand-Winding

Case Material

Hardlex-Coated Steel

Case Width

38mm

Case Thickness

12.0mm

Lug Width

19mm

Crystal

Sapphire

Bezel

Fixed

Water Resistance

110m

Dial Color

Navy

Jewels

36j

Frequency

28,800 bph

Power Reserve

57 hours

Year

1991

Related Models

• Seiko 3828-896
• Seiko 6682-444
• Seiko 7125-131
• Seiko 4473-937
• Seiko 6155-719
• Seiko 0726-673
• Seiko 7085-131
• Seiko 5243-375
• Seiko 0773-199
• Seiko 6340-455
• Seiko 4442-813
• Seiko 6681-459