Seiko Cal. 5613 - 381

Seiko 5613-381

The Seiko 5613-381 represents an important milestone in Seiko's 1978 lineup. Powered by the 5613 caliber with 20j jewels beating at 28,800 bph, it delivers a 50 hours power reserve. [seikata-wm-7e8eb699c2e4]

Also known as: Monster, Navigator

Specifications

Movement
Solar
Case Material
Titanium
Case Width
37mm
Case Thickness
13.8mm
Lug Width
18mm
Crystal
Sapphire
Bezel
Bidirectional
Water Resistance
130m
Dial Color
Cream
Jewels
20j
Frequency
28,800 bph
Power Reserve
50 hours
Year
1978

Related Models

seikata-wm-7e8eb699c2e4