Seiko Cal. 7138 - 723

Seiko 7138-723

The Seiko 7138-723 represents an important milestone in Seiko's 1977 lineup. Powered by the 7138 caliber with 27j jewels beating at 28,800 bph, it delivers a 54 hours power reserve. [seikata-wm-e69a9c1692ef]

Also known as: Monster, Bellmatic

Specifications

Movement
Spring Drive
Case Material
PVD Black
Case Width
43mm
Case Thickness
8.2mm
Lug Width
21mm
Crystal
Sapphire
Bezel
Coin-Edge
Water Resistance
40m
Dial Color
Champagne
Jewels
27j
Frequency
28,800 bph
Power Reserve
54 hours
Year
1977

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