Seiko Cal. 5661 - 450

This Hand-Winding model from 1968 features a 37mm Gold-Plated case. With its 21mm lug width and 14.2mm profile, it sits comfortably on most wrists. [seikata-wm-4a2d7c8bfaa5]

Also known as: Monster

Specifications

Movement

Hand-Winding

Case Material

Gold-Plated

Case Width

37mm

Case Thickness

14.2mm

Lug Width

21mm

Crystal

Mineral

Bezel

Coin-Edge

Water Resistance

50m

Dial Color

Green

Jewels

22j

Frequency

36,000 bph

Power Reserve

37 hours

Year

1968

Related Models

• Seiko 6311-744
• Seiko 3857-440
• Seiko 4494-946
• Seiko 4439-824
• Seiko 4431-404
• Seiko 6118-748
• Seiko 6629-105
• Seiko 5657-674
• Seiko 7172-165
• Seiko 5217-448
• Seiko 7044-811
• Seiko 6137-355