Seiko Cal. 4420 - 356

The 4420-356 is a sought-after Spring Drive piece from Seiko's golden era. Powered by the 4420 caliber with 23j jewels beating at 21,600 bph, it delivers a 39 hours power reserve. [seikata-wm-82187ca3fd04]

Specifications

Movement

Spring Drive

Case Material

PVD Black

Case Width

34mm

Case Thickness

15.0mm

Lug Width

19mm

Crystal

Hardlex

Bezel

Coin-Edge

Water Resistance

70m

Dial Color

Green

Jewels

23j

Frequency

21,600 bph

Power Reserve

39 hours

Year

1985

Related Models

• Seiko 3844-209
• Seiko 5256-359
• Seiko 6299-653
• Seiko 4513-841
• Seiko 6219-616
• Seiko 6663-872
• Seiko 7176-286
• Seiko 6631-978
• Seiko 6225-793
• Seiko 6237-563
• Seiko 7148-916
• Seiko 3882-432