Seiko Cal. 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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