Seiko Cal. 4423 - 448

The 4423-448 is a sought-after Hand-Winding piece from Seiko's golden era. Powered by the 4423 caliber with 31j jewels beating at 36,000 bph, it delivers a 45 hours power reserve. [seikata-wm-cf6c5ce275c9]

Also known as: Sumo, Crown

Specifications

Movement

Hand-Winding

Case Material

Gold-Plated

Case Width

37mm

Case Thickness

8.7mm

Lug Width

20mm

Crystal

Sapphire

Bezel

Fixed

Water Resistance

170m

Dial Color

Cream

Jewels

31j

Frequency

36,000 bph

Power Reserve

45 hours

Year

1965

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