Seiko Cal. 4438 - 957

Seiko 4438-957

The 4438-957 is a sought-after Solar piece from Seiko's golden era. Powered by the 4438 caliber with 33j jewels beating at 21,600 bph, it delivers a 49 hours power reserve. [seikata-wm-4f56a445203e]

Also known as: Helmet, UFO

Specifications

Movement
Solar
Case Material
Hardlex-Coated Steel
Case Width
45mm
Case Thickness
8.1mm
Lug Width
21mm
Crystal
Acrylic
Bezel
Coin-Edge
Water Resistance
90m
Dial Color
Silver
Jewels
33j
Frequency
21,600 bph
Power Reserve
49 hours
Year
1975

Related Models

seikata-wm-4f56a445203e