Seiko Cal. 5645 - 861

Released in 1975, the Cal. 5645 with design code 861 was part of Seiko's domestic market collection. It features a Silver dial protected by a Mineral crystal and offers 150m of water resistance. [seikata-wm-838587ff2bfe]

Also known as: Helmet, Silverwave

Specifications

Movement

Hand-Winding

Case Material

Stainless Steel

Case Width

44mm

Case Thickness

11.5mm

Lug Width

20mm

Crystal

Mineral

Bezel

Inner Rotating

Water Resistance

150m

Dial Color

Silver

Jewels

35j

Frequency

21,600 bph

Power Reserve

57 hours

Year

1975

Related Models

• Seiko 6148-823
• Seiko 3817-693
• Seiko 7075-293
• Seiko 6648-978
• Seiko 6330-595
• Seiko 6660-120
• Seiko 0772-967
• Seiko 4523-758
• Seiko 5266-816
• Seiko 6129-223
• Seiko 6625-140
• Seiko 4422-623