What is a “bumper” movement?
A “bumper” is an early automatic movement. Unlike a modern automatic, where the rotor spins a full 360 degrees, the rotor of a bumper moves… Read More »What is a “bumper” movement?
watches
Omega caliber 38.5 LT1 movement – specifications and photo
Omega caliber 38.5 LT1 is Swiss movement from 1930’s. Functions: hour, minute and sub second. This movement is used on pocket watches. Manual-winding movement with 15 jewels. f… Read More »Omega caliber 38.5 LT1 movement – specifications and photo
Omega caliber 18LPB movement – specifications and photo
Omega caliber 18LPB is Swiss movement from 1920’s. Functions: hour, minute and sub second. This movement is used on pocket watches. Manual-winding movement with 15 jewels (Breguet hairspring)… Read More »Omega caliber 18LPB movement – specifications and photo
Fredonia Watch Co; Fredonia, New York – 1883-1885
Formerly the Independent Watch Co. Some new machinery installed, but sales of the watch lagged very badly. In the fall of 1885 the machinery was… Read More »Fredonia Watch Co; Fredonia, New York – 1883-1885
Servicing a Poljot Chronograph 3133 movement
Servicing a Poljot Chronograph watch with caliber 3133 in pdf format. CLICK HERE
What is the Balance of a Watch?
The balance is a bar, balanced by two weights, or a circular ring, with a rim concentric to an axle carrying two pivots, upon which… Read More »What is the Balance of a Watch?
The Breguet system of watches – Literature
The Breguet system of watches differs essentially from those we have just described, first, in the caliber, and second, because the large pillar-plate, without pillars,… Read More »The Breguet system of watches – Literature
The water-resistance of IWC watches
The water-resistance of IWC watches is shown in bar and not in metres. Metres, which are often used elsewhere in the watch industry to indicate… Read More »The water-resistance of IWC watches
Vintage and modern watches with tungsten (wolfram) case
In this article i want to show you wristwatches with tungsten (wolfram) case. Tungsten is used for coating stainless steel case, distinguished by its hardness… Read More »Vintage and modern watches with tungsten (wolfram) case
How to use tachymeter and pulsometer scales
Using the tachymetric scale Example: calculating the speed of a car. Record the time the car takes to cover a distance of 1 kilometre. Read… Read More »How to use tachymeter and pulsometer scales
1962 – Rolex Oyster Perpetual Explorer Chronometer
The reference 1016 appears in the Rolex catalogues: OYSTER PERPETUAL EXPLORER CHRONOMETER which will be produced until 1990, then replaced by the new model 14270.… Read More »1962 – Rolex Oyster Perpetual Explorer Chronometer
Two Centuries of Tourbillons – Abraham-Louis Breguet
Abraham-Louis Breguet (1747–1823), a watchmaker who was legendary in his own lifetime, invented the tourbillon, which is French for “whirlwind,” in 1795 and patented the… Read More »Two Centuries of Tourbillons – Abraham-Louis Breguet