Seiko Cal. 5637 - 428

This Solar model from 1965 features a 40mm Titanium case. Powered by the 5637 caliber with 29j jewels beating at 28,800 bph, it delivers a 47 hours power reserve. [seikata-wm-558baf06c768]

Also known as: Bellmatic, Golden Tuna

Specifications

Movement

Solar

Case Material

Titanium

Case Width

40mm

Case Thickness

12.8mm

Lug Width

18mm

Crystal

Acrylic

Bezel

Inner Rotating

Water Resistance

50m

Dial Color

Black

Jewels

29j

Frequency

28,800 bph

Power Reserve

47 hours

Year

1965

Related Models

• Seiko 4551-982
• Seiko 5645-457
• Seiko 6276-297
• Seiko 0778-627
• Seiko 6125-232
• Seiko 7033-306
• Seiko 6299-255
• Seiko 6217-898
• Seiko 7146-685
• Seiko 6398-315
• Seiko 3826-719
• Seiko 6110-930