Seiko Cal. 6640 - 763

Seiko 6640-763

This Hand-Winding model from 1966 features a 41mm Two-Tone case. The Coin-Edge bezel and 41mm case give it a distinctive presence on the wrist. [seikata-wm-277f7a5e740a]

Also known as: Samurai

Specifications

Movement
Hand-Winding
Case Material
Two-Tone
Case Width
41mm
Case Thickness
8.0mm
Lug Width
19mm
Crystal
Mineral
Bezel
Coin-Edge
Water Resistance
40m
Dial Color
Navy
Jewels
35j
Frequency
21,600 bph
Power Reserve
61 hours
Year
1966

Related Models

seikata-wm-277f7a5e740a