Seiko Cal. 7138 - 399

Seiko 7138-399

The 7138-399 is a sought-after Spring Drive piece from Seiko's golden era. Powered by the 7138 caliber with 21j jewels beating at 28,800 bph, it delivers a 36 hours power reserve. [seikata-wm-8b338125332f]

Specifications

Movement
Spring Drive
Case Material
Two-Tone
Case Width
39mm
Case Thickness
8.3mm
Lug Width
21mm
Crystal
Hardlex
Bezel
Coin-Edge
Water Resistance
120m
Dial Color
Navy
Jewels
21j
Frequency
28,800 bph
Power Reserve
36 hours
Year
1994

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