Seiko Cal. 4436 - 858

The 4436-858 is a sought-after Spring Drive piece from Seiko's golden era. Powered by the 4436 caliber with 32j jewels beating at 28,800 bph, it delivers a 66 hours power reserve. [seikata-wm-d92933f98e79]

Also known as: Monster, Sumo

Specifications

Movement

Spring Drive

Case Material

Hardlex-Coated Steel

Case Width

41mm

Case Thickness

12.8mm

Lug Width

21mm

Crystal

Mineral

Bezel

Coin-Edge

Water Resistance

60m

Dial Color

Black

Jewels

32j

Frequency

28,800 bph

Power Reserve

66 hours

Year

1966

Related Models

• Seiko 6120-457
• Seiko 5685-121
• Seiko 5234-423
• Seiko 4449-466
• Seiko 6278-340
• Seiko 5218-790
• Seiko 5285-390
• Seiko 6691-105
• Seiko 6115-409
• Seiko 7054-855
• Seiko 6235-174
• Seiko 5271-303