Seiko Cal. 4428 - 437

Seiko 4428-437

The Seiko 4428-437 represents an important milestone in Seiko's 1992 lineup. Powered by the 4428 caliber with 25j jewels beating at 36,000 bph, it delivers a 49 hours power reserve. [seikata-wm-0f803f828966]

Also known as: Helmet, Golden Tuna

Specifications

Movement
Hand-Winding
Case Material
Stainless Steel
Case Width
39mm
Case Thickness
11.8mm
Lug Width
19mm
Crystal
Hardlex
Bezel
Rotating
Water Resistance
80m
Dial Color
Black
Jewels
25j
Frequency
36,000 bph
Power Reserve
49 hours
Year
1992

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