Seiko Cal. 3866 - 712

Seiko 3866-712

The 3866-712 is a sought-after Spring Drive piece from Seiko's golden era. Powered by the 3866 caliber with 17j jewels beating at 28,800 bph, it delivers a 49 hours power reserve. [seikata-wm-72f489d656a6]

Also known as: Turtle, Sportsmatic

Specifications

Movement
Spring Drive
Case Material
Stainless Steel
Case Width
37mm
Case Thickness
11.0mm
Lug Width
20mm
Crystal
Acrylic
Bezel
Bidirectional
Water Resistance
40m
Dial Color
Green
Jewels
17j
Frequency
28,800 bph
Power Reserve
49 hours
Year
1965

Related Models

seikata-wm-72f489d656a6