Seiko Cal. 6645 - 437

The Seiko 6645-437 represents an important milestone in Seiko's 1982 lineup. It features a Cream dial protected by a Sapphire crystal and offers 190m of water resistance. [seikata-wm-c595d8139607]

Also known as: Helmet

Specifications

Movement

Solar

Case Material

Hardlex-Coated Steel

Case Width

40mm

Case Thickness

8.8mm

Lug Width

21mm

Crystal

Sapphire

Bezel

Rotating

Water Resistance

190m

Dial Color

Cream

Jewels

33j

Frequency

36,000 bph

Power Reserve

55 hours

Year

1982

Related Models

• Seiko 7062-570
• Seiko 7077-636
• Seiko 7131-417
• Seiko 6123-967
• Seiko 4462-180
• Seiko 0770-966
• Seiko 5219-178
• Seiko 6277-386
• Seiko 4466-681
• Seiko 3890-644
• Seiko 7164-351
• Seiko 6227-917