Seiko Cal. 5638 - 227

Seiko 5638-227

The 5638-227 is a sought-after Spring Drive piece from Seiko's golden era. Powered by the 5638 caliber with 25j jewels beating at 36,000 bph, it delivers a 43 hours power reserve. [seikata-wm-2f446cc3d2bc]

Also known as: Baby Tuna

Specifications

Movement
Spring Drive
Case Material
PVD Black
Case Width
39mm
Case Thickness
10.3mm
Lug Width
21mm
Crystal
Mineral
Bezel
Coin-Edge
Water Resistance
180m
Dial Color
Champagne
Jewels
25j
Frequency
36,000 bph
Power Reserve
43 hours
Year
1985

Related Models

seikata-wm-2f446cc3d2bc