Seiko Cal. 4438 - 918

Seiko 4438-918

The 4438-918 is a sought-after Automatic piece from Seiko's golden era. Powered by the 4438 caliber with 34j jewels beating at 36,000 bph, it delivers a 71 hours power reserve. [seikata-wm-d3231405fda4]

Also known as: Sumo, Bellmatic

Specifications

Movement
Automatic
Case Material
Titanium
Case Width
45mm
Case Thickness
13.5mm
Lug Width
20mm
Crystal
Sapphire
Bezel
Bidirectional
Water Resistance
100m
Dial Color
Blue Sunburst
Jewels
34j
Frequency
36,000 bph
Power Reserve
71 hours
Year
1991

Related Models

seikata-wm-d3231405fda4