Seiko Cal. 5231 - 540

The Seiko 5231-540 represents an important milestone in Seiko's 1992 lineup. It features a Navy dial protected by a Sapphire crystal and offers 40m of water resistance. [seikata-wm-e83a61ea5d7e]

Also known as: Panda

Specifications

Movement

Hand-Winding

Case Material

Two-Tone

Case Width

41mm

Case Thickness

9.1mm

Lug Width

18mm

Crystal

Sapphire

Bezel

Inner Rotating

Water Resistance

40m

Dial Color

Navy

Jewels

22j

Frequency

36,000 bph

Power Reserve

51 hours

Year

1992

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