Seiko Cal. 5646 - 615

The 5646-615 is a sought-after Solar piece from Seiko's golden era. Powered by the 5646 caliber with 18j jewels beating at 28,800 bph, it delivers a 50 hours power reserve. [seikata-wm-5437ce8f7b59]

Also known as: Helmet

Specifications

Movement

Solar

Case Material

Two-Tone

Case Width

44mm

Case Thickness

11.7mm

Lug Width

18mm

Crystal

Sapphire

Bezel

Rotating

Water Resistance

130m

Dial Color

Burgundy

Jewels

18j

Frequency

28,800 bph

Power Reserve

50 hours

Year

1990

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