Seiko Cal. 4441 - 638

The 4441-638 is a sought-after Solar piece from Seiko's golden era. Powered by the 4441 caliber with 18j jewels beating at 28,800 bph, it delivers a 46 hours power reserve. [seikata-wm-f8cbf33025aa]

Also known as: Tuna

Specifications

Movement

Solar

Case Material

Gold-Plated

Case Width

46mm

Case Thickness

9.9mm

Lug Width

20mm

Crystal

Mineral

Bezel

Inner Rotating

Water Resistance

70m

Dial Color

Green

Jewels

18j

Frequency

28,800 bph

Power Reserve

46 hours

Year

1976

Related Models

• Seiko 5680-328
• Seiko 7055-794
• Seiko 3888-495
• Seiko 5254-904
• Seiko 6183-377
• Seiko 5256-820
• Seiko 4584-966
• Seiko 6241-219
• Seiko 6222-825
• Seiko 0790-827
• Seiko 3859-898
• Seiko 0756-246