Seiko Cal. 5644 - 613

This Solar model from 1968 features a 37mm PVD Black case. Powered by the 5644 caliber with 26j jewels beating at 21,600 bph, it delivers a 49 hours power reserve. [seikata-wm-1a4dd7b92387]

Also known as: Baby Tuna

Specifications

Movement

Solar

Case Material

PVD Black

Case Width

37mm

Case Thickness

15.9mm

Lug Width

22mm

Crystal

Sapphire

Bezel

Inner Rotating

Water Resistance

170m

Dial Color

Burgundy

Jewels

26j

Frequency

21,600 bph

Power Reserve

49 hours

Year

1968

Related Models

• Seiko 5661-588
• Seiko 7190-451
• Seiko 3812-129
• Seiko 5640-739
• Seiko 5642-879
• Seiko 5681-763
• Seiko 7037-733
• Seiko 4432-789
• Seiko 5678-384
• Seiko 6218-326
• Seiko 5689-446
• Seiko 4591-780