Seiko Cal. 6623 - 178

The 6623-178 is a sought-after Spring Drive piece from Seiko's golden era. Powered by the 6623 caliber with 18j jewels beating at 21,600 bph, it delivers a 49 hours power reserve. [seikata-wm-b66783975be3]

Also known as: Tuna, Crown

Specifications

Movement

Spring Drive

Case Material

PVD Black

Case Width

40mm

Case Thickness

11.6mm

Lug Width

21mm

Crystal

Mineral

Bezel

Inner Rotating

Water Resistance

40m

Dial Color

Green

Jewels

18j

Frequency

21,600 bph

Power Reserve

49 hours

Year

1990

Related Models

• Seiko 6636-166
• Seiko 6351-709
• Seiko 3881-471
• Seiko 4543-689
• Seiko 7152-341
• Seiko 6114-820
• Seiko 7013-522
• Seiko 5286-247
• Seiko 6299-100
• Seiko 6336-460
• Seiko 6273-253
• Seiko 5671-774