Seiko Cal. 0731 - 552

The 0731-552 is a sought-after Spring Drive piece from Seiko's golden era. With its 21mm lug width and 15.4mm profile, it sits comfortably on most wrists. [seikata-wm-5bbc8bde42dc]

Also known as: Baby Tuna, Arnie

Specifications

Movement

Spring Drive

Case Material

Titanium

Case Width

36mm

Case Thickness

15.4mm

Lug Width

21mm

Crystal

Sapphire

Bezel

Bidirectional

Water Resistance

200m

Dial Color

Cream

Jewels

29j

Frequency

36,000 bph

Power Reserve

63 hours

Year

1966

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