Seiko Cal. 5240 - 120

Seiko 5240-120

The 5240-120 is a sought-after Automatic piece from Seiko's golden era. Powered by the 5240 caliber with 31j jewels beating at 28,800 bph, it delivers a 39 hours power reserve. [seikata-wm-ca7814f9e8a4]

Also known as: Baby Tuna

Specifications

Movement
Automatic
Case Material
Gold-Plated
Case Width
38mm
Case Thickness
8.4mm
Lug Width
20mm
Crystal
Sapphire
Bezel
Fixed
Water Resistance
110m
Dial Color
Navy
Jewels
31j
Frequency
28,800 bph
Power Reserve
39 hours
Year
1980

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