Seiko Cal. 3813 - 870

This Hand-Winding model from 1970 features a 45mm Titanium case. It features a Navy dial protected by a Acrylic crystal and offers 50m of water resistance. [seikata-wm-6aa26760d025]

Also known as: Sumo

Specifications

Movement

Hand-Winding

Case Material

Titanium

Case Width

45mm

Case Thickness

8.6mm

Lug Width

19mm

Crystal

Acrylic

Bezel

Inner Rotating

Water Resistance

50m

Dial Color

Navy

Jewels

33j

Frequency

28,800 bph

Power Reserve

50 hours

Year

1970

Related Models

• Seiko 6126-774
• Seiko 5226-109
• Seiko 3870-357
• Seiko 3875-133
• Seiko 5266-571
• Seiko 6631-507
• Seiko 7025-115
• Seiko 5298-836
• Seiko 4519-186
• Seiko 4513-422
• Seiko 5614-167
• Seiko 4590-309