Seiko Cal. 4423 - 315

The 4423-315 is a sought-after Spring Drive piece from Seiko's golden era. Powered by the 4423 caliber with 31j jewels beating at 36,000 bph, it delivers a 64 hours power reserve. [seikata-wm-0d8ebbbcfa85]

Also known as: Helmet

Specifications

Movement

Spring Drive

Case Material

PVD Black

Case Width

42mm

Case Thickness

14.2mm

Lug Width

18mm

Crystal

Sapphire

Bezel

Bidirectional

Water Resistance

120m

Dial Color

Black

Jewels

31j

Frequency

36,000 bph

Power Reserve

64 hours

Year

1968

Related Models

• Seiko 7012-472
• Seiko 7172-595
• Seiko 5673-718
• Seiko 5617-253
• Seiko 7018-581
• Seiko 4469-333
• Seiko 6387-519
• Seiko 5223-759
• Seiko 6677-552
• Seiko 6211-623
• Seiko 6347-602
• Seiko 0766-522