Seiko Cal. 5661 - 815

The 5661-815 is a sought-after Hand-Winding piece from Seiko's golden era. Powered by the 5661 caliber with 20j jewels beating at 28,800 bph, it delivers a 70 hours power reserve. [seikata-wm-1c2cf03ef80d]

Also known as: Monster, Rally

Specifications

Movement

Hand-Winding

Case Material

Stainless Steel

Case Width

34mm

Case Thickness

11.3mm

Lug Width

21mm

Crystal

Mineral

Bezel

Bidirectional

Water Resistance

40m

Dial Color

Blue Sunburst

Jewels

20j

Frequency

28,800 bph

Power Reserve

70 hours

Year

1974

Related Models

• Seiko 7099-578
• Seiko 7059-795
• Seiko 6670-846
• Seiko 5225-157
• Seiko 6318-247
• Seiko 7143-885
• Seiko 5277-674
• Seiko 6659-369
• Seiko 6367-863
• Seiko 6294-609
• Seiko 7122-571
• Seiko 6649-958