Seiko Cal. 4550 - 504

This Hand-Winding model from 1970 features a 43mm Titanium case. Powered by the 4550 caliber with 18j jewels beating at 21,600 bph, it delivers a 48 hours power reserve. [seikata-wm-8a8e4582929e]

Also known as: Crown, Emperor

Specifications

Movement

Hand-Winding

Case Material

Titanium

Case Width

43mm

Case Thickness

14.0mm

Lug Width

19mm

Crystal

Hardlex

Bezel

Coin-Edge

Water Resistance

150m

Dial Color

Champagne

Jewels

18j

Frequency

21,600 bph

Power Reserve

48 hours

Year

1970

Related Models

• Seiko 6678-947
• Seiko 6198-215
• Seiko 4431-751
• Seiko 5231-471
• Seiko 6680-267
• Seiko 6265-786
• Seiko 7152-804
• Seiko 7089-240
• Seiko 6115-959
• Seiko 6154-308
• Seiko 6348-790
• Seiko 6130-696