Seiko Cal. 4438 - 620

The 4438-620 is a sought-after Spring Drive piece from Seiko's golden era. Powered by the 4438 caliber with 22j jewels beating at 36,000 bph, it delivers a 36 hours power reserve. [seikata-wm-8b7904971bba]

Specifications

Movement

Spring Drive

Case Material

Titanium

Case Width

40mm

Case Thickness

10.2mm

Lug Width

20mm

Crystal

Mineral

Bezel

Inner Rotating

Water Resistance

130m

Dial Color

Burgundy

Jewels

22j

Frequency

36,000 bph

Power Reserve

36 hours

Year

1978

Related Models

• Seiko 3859-150
• Seiko 4431-595
• Seiko 4481-621
• Seiko 6332-741
• Seiko 5628-914
• Seiko 0761-200
• Seiko 6239-812
• Seiko 7027-389
• Seiko 4565-412
• Seiko 6112-461
• Seiko 4523-552
• Seiko 5698-272