Seiko Cal. 6638 - 657

Seiko 6638-657

The 6638-657 is a sought-after Automatic piece from Seiko's golden era. It features a Burgundy dial protected by a Mineral crystal and offers 130m of water resistance. [seikata-wm-5734798748ab]

Also known as: Turtle, Bullhead

Specifications

Movement
Automatic
Case Material
Titanium
Case Width
42mm
Case Thickness
13.2mm
Lug Width
22mm
Crystal
Mineral
Bezel
Fixed
Water Resistance
130m
Dial Color
Burgundy
Jewels
23j
Frequency
21,600 bph
Power Reserve
46 hours
Year
1978

Related Models

seikata-wm-5734798748ab