Seiko Cal. 6642 - 388

Seiko 6642-388

The Seiko 6642-388 represents an important milestone in Seiko's 1970 lineup. The Rotating bezel and 40mm case give it a distinctive presence on the wrist. [seikata-wm-88d45d2c33be]

Also known as: Tuna, Sportsmatic

Specifications

Movement
Spring Drive
Case Material
PVD Black
Case Width
40mm
Case Thickness
14.2mm
Lug Width
22mm
Crystal
Sapphire
Bezel
Rotating
Water Resistance
50m
Dial Color
Burgundy
Jewels
35j
Frequency
21,600 bph
Power Reserve
70 hours
Year
1970

Related Models

seikata-wm-88d45d2c33be