Seiko Cal. 6640 - 685

Seiko 6640-685

The 6640-685 is a sought-after Hand-Winding piece from Seiko's golden era. Powered by the 6640 caliber with 34j jewels beating at 28,800 bph, it delivers a 48 hours power reserve. [seikata-wm-90968ac8fdcc]

Also known as: Turtle, Helmet

Specifications

Movement
Hand-Winding
Case Material
Stainless Steel
Case Width
42mm
Case Thickness
11.2mm
Lug Width
22mm
Crystal
Sapphire
Bezel
Bidirectional
Water Resistance
140m
Dial Color
Navy
Jewels
34j
Frequency
28,800 bph
Power Reserve
48 hours
Year
1993

Related Models

seikata-wm-90968ac8fdcc