Seiko Cal. 7138 - 648

Seiko 7138-648

The 7138-648 is a sought-after Hand-Winding piece from Seiko's golden era. Powered by the 7138 caliber with 35j jewels beating at 21,600 bph, it delivers a 68 hours power reserve. [seikata-wm-7a570026ed2c]

Also known as: UFO, Golden Tuna

Specifications

Movement
Hand-Winding
Case Material
Stainless Steel
Case Width
41mm
Case Thickness
10.7mm
Lug Width
20mm
Crystal
Sapphire
Bezel
Coin-Edge
Water Resistance
90m
Dial Color
Silver
Jewels
35j
Frequency
21,600 bph
Power Reserve
68 hours
Year
1976

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seikata-wm-7a570026ed2c