Seiko Cal. 5240 - 983

The 5240-983 is a sought-after Automatic piece from Seiko's golden era. It features a Blue Sunburst dial protected by a Sapphire crystal and offers 90m of water resistance. [seikata-wm-c6a95dda17e8]

Also known as: Baby Tuna

Specifications

Movement

Automatic

Case Material

Gold-Plated

Case Width

35mm

Case Thickness

12.8mm

Lug Width

20mm

Crystal

Sapphire

Bezel

Coin-Edge

Water Resistance

90m

Dial Color

Blue Sunburst

Jewels

33j

Frequency

21,600 bph

Power Reserve

45 hours

Year

1991

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