Seiko Cal. 6636 - 318

The 6636-318 is a sought-after Spring Drive piece from Seiko's golden era. Powered by the 6636 caliber with 25j jewels beating at 28,800 bph, it delivers a 45 hours power reserve. [seikata-wm-f48668d2dc6e]

Also known as: Arnie

Specifications

Movement

Spring Drive

Case Material

Gold-Plated

Case Width

46mm

Case Thickness

15.4mm

Lug Width

22mm

Crystal

Sapphire

Bezel

Coin-Edge

Water Resistance

110m

Dial Color

Navy

Jewels

25j

Frequency

28,800 bph

Power Reserve

45 hours

Year

1974

Related Models

• Seiko 7067-817
• Seiko 5682-579
• Seiko 4571-858
• Seiko 0756-292
• Seiko 6130-928
• Seiko 5246-631
• Seiko 4420-580
• Seiko 6336-381
• Seiko 4596-492
• Seiko 3840-714
• Seiko 6383-194
• Seiko 6648-852