Seiko Cal. 3850 - 707

Seiko 3850-707

The 3850-707 is a sought-after Automatic piece from Seiko's golden era. Powered by the 3850 caliber with 28j jewels beating at 21,600 bph, it delivers a 37 hours power reserve. [seikata-wm-e994f301792b]

Also known as: Bullhead, Baby Tuna

Specifications

Movement
Automatic
Case Material
Stainless Steel
Case Width
45mm
Case Thickness
12.1mm
Lug Width
19mm
Crystal
Sapphire
Bezel
Rotating
Water Resistance
80m
Dial Color
Navy
Jewels
28j
Frequency
21,600 bph
Power Reserve
37 hours
Year
1985

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