Seiko Cal. 5635 - 728

The 5635-728 is a sought-after Solar piece from Seiko's golden era. Powered by the 5635 caliber with 30j jewels beating at 21,600 bph, it delivers a 46 hours power reserve. [seikata-wm-fc577acfe88a]

Also known as: Monster, Baby Tuna

Specifications

Movement

Solar

Case Material

Hardlex-Coated Steel

Case Width

38mm

Case Thickness

12.3mm

Lug Width

19mm

Crystal

Sapphire

Bezel

Bidirectional

Water Resistance

60m

Dial Color

Champagne

Jewels

30j

Frequency

21,600 bph

Power Reserve

46 hours

Year

1984

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