Seiko Cal. 6645 - 787

The Seiko 6645-787 represents an important milestone in Seiko's 1974 lineup. It features a Green dial protected by a Acrylic crystal and offers 40m of water resistance. [seikata-wm-795b58b28a26]

Also known as: UFO

Specifications

Movement

Spring Drive

Case Material

Hardlex-Coated Steel

Case Width

36mm

Case Thickness

8.4mm

Lug Width

21mm

Crystal

Acrylic

Bezel

Bidirectional

Water Resistance

40m

Dial Color

Green

Jewels

24j

Frequency

36,000 bph

Power Reserve

51 hours

Year

1974

Related Models

• Seiko 7136-688
• Seiko 6690-927
• Seiko 0739-473
• Seiko 4420-914
• Seiko 7159-891
• Seiko 6145-520
• Seiko 7147-558
• Seiko 7174-903
• Seiko 7016-212
• Seiko 5243-947
• Seiko 6163-332
• Seiko 4456-839