Seiko Cal. 7138 - 307

Seiko 7138-307

The 7138-307 is a sought-after Automatic piece from Seiko's golden era. Powered by the 7138 caliber with 21j jewels beating at 21,600 bph, it delivers a 44 hours power reserve. [seikata-wm-d17563828ff1]

Specifications

Movement
Automatic
Case Material
Hardlex-Coated Steel
Case Width
34mm
Case Thickness
9.8mm
Lug Width
21mm
Crystal
Sapphire
Bezel
Fixed
Water Resistance
100m
Dial Color
Navy
Jewels
21j
Frequency
21,600 bph
Power Reserve
44 hours
Year
1989

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