Seiko Cal. 5645 - 623

The 5645-623 is a sought-after Hand-Winding piece from Seiko's golden era. Powered by the 5645 caliber with 23j jewels beating at 36,000 bph, it delivers a 65 hours power reserve. [seikata-wm-602b4de678c0]

Also known as: Sportsmatic

Specifications

Movement

Hand-Winding

Case Material

Two-Tone

Case Width

39mm

Case Thickness

12.8mm

Lug Width

21mm

Crystal

Acrylic

Bezel

Bidirectional

Water Resistance

110m

Dial Color

Silver

Jewels

23j

Frequency

36,000 bph

Power Reserve

65 hours

Year

1971

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