Seiko Cal. 6639 - 663

Seiko 6639-663

The 6639-663 is a sought-after Solar piece from Seiko's golden era. The Bidirectional bezel and 43mm case give it a distinctive presence on the wrist. [seikata-wm-48a949582272]

Also known as: UFO, Baby Tuna

Specifications

Movement
Solar
Case Material
Two-Tone
Case Width
43mm
Case Thickness
13.2mm
Lug Width
20mm
Crystal
Hardlex
Bezel
Bidirectional
Water Resistance
180m
Dial Color
Black
Jewels
18j
Frequency
28,800 bph
Power Reserve
43 hours
Year
1986

Related Models

seikata-wm-48a949582272