Seiko Cal. 5645 - 978

The 5645-978 is a sought-after Solar piece from Seiko's golden era. It features a Burgundy dial protected by a Sapphire crystal and offers 50m of water resistance. [seikata-wm-be2acec6df03]

Also known as: Tuna

Specifications

Movement

Solar

Case Material

Hardlex-Coated Steel

Case Width

39mm

Case Thickness

10.1mm

Lug Width

21mm

Crystal

Sapphire

Bezel

Inner Rotating

Water Resistance

50m

Dial Color

Burgundy

Jewels

29j

Frequency

36,000 bph

Power Reserve

38 hours

Year

1978

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