Seiko Cal. 5646 - 977

This Hand-Winding model from 1966 features a 40mm Two-Tone case. Powered by the 5646 caliber with 24j jewels beating at 36,000 bph, it delivers a 57 hours power reserve. [seikata-wm-755e8d7ed6fc]

Also known as: Panda, Helmet

Specifications

Movement

Hand-Winding

Case Material

Two-Tone

Case Width

40mm

Case Thickness

9.5mm

Lug Width

19mm

Crystal

Mineral

Bezel

Rotating

Water Resistance

150m

Dial Color

White

Jewels

24j

Frequency

36,000 bph

Power Reserve

57 hours

Year

1966

Related Models

• Seiko 6383-993
• Seiko 3820-248
• Seiko 4578-390
• Seiko 4587-420
• Seiko 6191-846
• Seiko 4458-652
• Seiko 6386-332
• Seiko 4573-288
• Seiko 7137-280
• Seiko 7153-172
• Seiko 5243-499
• Seiko 5698-749