Seiko Cal. 3831 - 650

The 3831-650 is a sought-after Hand-Winding piece from Seiko's golden era. It features a Navy dial protected by a Acrylic crystal and offers 150m of water resistance. [seikata-wm-79b07b9ee257]

Also known as: Monster, Bullhead

Specifications

Movement

Hand-Winding

Case Material

PVD Black

Case Width

45mm

Case Thickness

10.7mm

Lug Width

19mm

Crystal

Acrylic

Bezel

Coin-Edge

Water Resistance

150m

Dial Color

Navy

Jewels

21j

Frequency

36,000 bph

Power Reserve

65 hours

Year

1967

Related Models

• Seiko 6618-355
• Seiko 4424-135
• Seiko 3889-777
• Seiko 5295-487
• Seiko 6624-786
• Seiko 5657-737
• Seiko 5244-774
• Seiko 3825-795
• Seiko 7180-371
• Seiko 5612-688
• Seiko 7136-143
• Seiko 7157-788