Seiko Cal. 6618 - 220

This Spring Drive model from 1973 features a 39mm Two-Tone case. Powered by the 6618 caliber with 23j jewels beating at 21,600 bph, it delivers a 59 hours power reserve. [seikata-wm-a458270d5390]

Also known as: UFO, Bellmatic

Specifications

Movement

Spring Drive

Case Material

Two-Tone

Case Width

39mm

Case Thickness

11.9mm

Lug Width

19mm

Crystal

Sapphire

Bezel

Fixed

Water Resistance

140m

Dial Color

Champagne

Jewels

23j

Frequency

21,600 bph

Power Reserve

59 hours

Year

1973

Related Models

• Seiko 6690-755
• Seiko 4436-229
• Seiko 5623-482
• Seiko 7179-519
• Seiko 5268-350
• Seiko 0752-885
• Seiko 6272-786
• Seiko 6643-456
• Seiko 5652-493
• Seiko 6147-184
• Seiko 7046-607
• Seiko 6231-257