Seiko Cal. 5645 - 820

The 5645-820 is a sought-after Automatic piece from Seiko's golden era. With its 21mm lug width and 8.6mm profile, it sits comfortably on most wrists. [seikata-wm-5b4ccbb34abc]

Also known as: Helmet

Specifications

Movement

Automatic

Case Material

Titanium

Case Width

34mm

Case Thickness

8.6mm

Lug Width

21mm

Crystal

Mineral

Bezel

Rotating

Water Resistance

170m

Dial Color

White

Jewels

31j

Frequency

28,800 bph

Power Reserve

38 hours

Year

1965

Related Models

• Seiko 5244-878
• Seiko 5250-406
• Seiko 7081-313
• Seiko 6187-303
• Seiko 6295-654
• Seiko 4530-591
• Seiko 6116-808
• Seiko 6289-218
• Seiko 6276-101
• Seiko 5646-422
• Seiko 7140-431
• Seiko 4573-594