Seiko Cal. 6657 - 937

Seiko 6657-937

The 6657-937 is a sought-after Spring Drive piece from Seiko's golden era. It features a White dial protected by a Mineral crystal and offers 90m of water resistance. [seikata-wm-68fd30a4fa48]

Also known as: Rally, Navigator

Specifications

Movement
Spring Drive
Case Material
Hardlex-Coated Steel
Case Width
45mm
Case Thickness
11.8mm
Lug Width
21mm
Crystal
Mineral
Bezel
Fixed
Water Resistance
90m
Dial Color
White
Jewels
20j
Frequency
36,000 bph
Power Reserve
43 hours
Year
1981

Related Models

seikata-wm-68fd30a4fa48