Seiko Cal. 5661 - 937

The 5661-937 is a sought-after Spring Drive piece from Seiko's golden era. It features a Blue Sunburst dial protected by a Mineral crystal and offers 30m of water resistance. [seikata-wm-96c8fc457a37]

Also known as: Sumo

Specifications

Movement

Spring Drive

Case Material

Two-Tone

Case Width

45mm

Case Thickness

10.3mm

Lug Width

19mm

Crystal

Mineral

Bezel

Inner Rotating

Water Resistance

30m

Dial Color

Blue Sunburst

Jewels

25j

Frequency

28,800 bph

Power Reserve

54 hours

Year

1980

Related Models

• Seiko 5656-716
• Seiko 6614-926
• Seiko 0795-984
• Seiko 6186-906
• Seiko 3811-199
• Seiko 4534-554
• Seiko 4478-140
• Seiko 6253-527
• Seiko 0720-542
• Seiko 0788-958
• Seiko 6327-764
• Seiko 4424-918