Seiko Cal. 6616 - 421

This Hand-Winding model from 1978 features a 35mm Titanium case. It features a Navy dial protected by a Mineral crystal and offers 180m of water resistance. [seikata-wm-50df09b086d2]

Also known as: Monster

Specifications

Movement

Hand-Winding

Case Material

Titanium

Case Width

35mm

Case Thickness

10.0mm

Lug Width

20mm

Crystal

Mineral

Bezel

Bidirectional

Water Resistance

180m

Dial Color

Navy

Jewels

24j

Frequency

28,800 bph

Power Reserve

58 hours

Year

1978

Related Models

• Seiko 4577-658
• Seiko 6611-895
• Seiko 4433-325
• Seiko 0758-170
• Seiko 7182-129
• Seiko 4431-992
• Seiko 7193-695
• Seiko 5659-210
• Seiko 5627-820
• Seiko 5664-215
• Seiko 5248-839
• Seiko 0721-312