Seiko Cal. 4537 - 555

Released in 1970, the Cal. 4537 with design code 555 was part of Seiko's domestic market collection. It features a Navy dial protected by a Sapphire crystal and offers 80m of water resistance. [seikata-wm-ebab25192bb5]

Also known as: Tuna

Specifications

Movement

Solar

Case Material

Titanium

Case Width

44mm

Case Thickness

14.0mm

Lug Width

20mm

Crystal

Sapphire

Bezel

Bidirectional

Water Resistance

80m

Dial Color

Navy

Jewels

24j

Frequency

36,000 bph

Power Reserve

52 hours

Year

1970

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