Rolex caliber 3230 movement – specifications and photo

Rolex caliber 3230 is Swiss movement from 2020.

Functions: hours, minutes and seconds

Automatic (bi-directional winding) movement with 31 jewels

f = 28800 A/h/4 HZ

Power reserve: 70 hours

Diameter: 28.5 mm

More:

Made of nickel-phosphorus, it is also insensitive to magnetic fields. The movement is fitted with an optimized blue Parachrom hairspring, manufactured by Rolex in an exclusive paramagnetic alloy that makes it up to 10 times more precise than a traditional hairspring in case of shocks. The blue Parachrom hairspring is equipped with a Rolex overcoil, ensuring the calibre’s regularity in any position.

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IWC caliber 79420 movement – specifications and photo

IWC caliber 79420 is Swiss movement from 201X.

Functions: day and date display, chronograph, small hacking seconds, rattrapante (split seconds hand for intermediate timing).

Automatic movement with 29 jewels

f = 28800 A/h/4 HZ

Power reserve: 44 hours

Diameter: 30.0 mm

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Omega Genève Dynamic Watches – Reference numbers by years

In this article I will describe the reference numbers of Omega Genève Dynamic watches by years of production.

 

Omega Genève Dynamic Mens International Collection

1967 Reference number: 165.0039

MOVEMENT

Calibre number: 552

24 jewels

Central sweep-second hand. International Collection: 1967-1974

DIAL

Different types of dials available, with luminous hands. Rivetted markers optional extra

CRYSTAL

Armoured hesalite

BRACELET

Corfam or SS bracelet

1153/138

WATER RES

30 meters

CASE

Stainless steel (case opening on dial side)

FUNCTIONS

1967 Reference number: 166.0039

MOVEMENT

Calibre number: 565

24 jewels

Central sweep-second hand. International Collection: 1967-1979

DIAL

Different types of dials available, with luminous hands.

CRYSTAL

Armoured hesalite

BRACELET

Corfam or SS bracelet 1153/138

WATER RES

30 meters

CASE

Stainless steel (case opening on dial side)

Also available in 18k solid gold or 14k Gold Cap

FUNCTIONS

Date

1968 Reference number: ST 135.0033

MOVEMENT

Calibre number: 601 manual winding

17 jewels. International Collection: 1968-1971

DIAL

Different styles available, with luminous hands. Rivetted markers optional

CRYSTAL

Armoured hesalite

BRACELET

SS bracelet 1153/138

WATER RES

30 meters

CASE

Stainless steel Unishell (case opening on dial side)

1968 Reference number: ST 136.0033

MOVEMENT

Calibre number: 613

17 jewels

Central sweep-second hand. International Collection: 1968-1972

DIAL

Different styles

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Hamilton caliber 747 movement – specifications and photo

Hamilton caliber 747 is U.S.A movement from 1940s.

Functions: sub second

Manual-winding movement with 17 jewels.

F = 18000 A/h

Power reserve: N/A

Diameter: 23.2 mm

Hamilton caliber 747 movement – specifications and photo

More information:

Design: Hamilton Grade 747 is a modern three-quarter plate movement with wide bevels on the bridges and the pillar plate. Both bridges and the pillar plate are rhodium plated. The balance cock and both bridges employ integral steady pins. And a case alignment slot in the pillar plate provides for accurate and secure location of the movement in a case. While Grade 747 is the first 8/0 movement Hamilton has ever manufactured in quantity, it is not the first one it has ever designed or made. Hamilton engineers and technicians have been designing and building and studying experimental 8/0 models for more than 10 years. While work on the movement was virtually abandoned during World War II, final development was not sacrificed. The experience and new knowledge acquired building war timepieces proved to be precisely the experience and knowledge needed to complete the project.

Grade 747 is a fine movement through and through. It is a fine looking movement. More than that, it is a fine watch to service or repair. … Continue reading...

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Overview of The Mechanical Watch Movement

A true watch enthusiast will naturally want to understand what watches can do. To understand what watches can do one needs to appreciate how they work.
A mechanical movement operates without a battery. It varies in complexity and can be constructed from fewer than 100 parts or well in excess of 1,000! A mechanical movement comprises for core elements: the power source, transmission, distribution and regulation.
Despite the busy, almost chaotic appearance of a watch movement, the four core elements are always present. The watch is wound and it charges a coiled mainspring – the power source. The mainspring doesn’t instantly release because it is connected to a gear train, which is the transmission element. The gear train is a series of wheels and pinions held together by arbors, the most active of which are pivoted by jewelled bearings to avoid rapid deterioration from friction. Imagine this configuration to be like a tree (arbor is the Latin word for tree) – the pinion surrounds the base of the arbor like bark around the trunk of a tree, the foliage at the top is the wheel. If you want to spin the “tree” you grip the bark and spin it at … Continue reading...

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