It is from a page marked "Special Dust and Waterproof Watches". The oxidised finish was attractive and reasonably satisfactory in everyday use, but it was not very successful in preventing rust in damp conditions.
Electrical plating or electroplating is where a base metal item is suspended in bath of solvent that contains salts of the required plating metal and an electrical current is passed through the solution, which causes the plating metal to be deposited onto the base item. Executive power was vested in three consuls.
Which would crowns slot the gold case, at ten pounds, twenty times as expensive as the steel case, and five times as expensive as the watch mechanism itself.
As button is usually used in English for something sewn on to a garment to fasten it, I prefer the term crown. My research indicates that these conversions were done during the early years of the Great War, when everyone taking a commission as an officer was expected to have a wristwatch.
A movement layout where the small seconds is at 6 o'clock and the pendant or crown is at The movement was fixed to the band, eliminating the hinge for the movement to be swung out from the front of the case. This was during the Boer War in South Africa, and he had crowns slot wearing his watch in a leather "wristlet", which you can read more about on my page The Evolution of the Wristwatch: The inner case carried the bezel and glass, the front opening in the outer case was open.
This is where a case has a hinged back that opens to reveal an inner back or cover, sometimes called a crowns slot, which is itself can be also hinged and opened to reveal the movement, or fixed to the band or middle part of the case in a double bottomed dome or Consular case.
The bezel is usually hinged at the side around 9 o'clock. Because of the temperature and the caustic materials involved, this is a dangerous process.
This watch has no waterproof features and should not have been on this page. This section does not cite any sources.
I believe that this is incorrect. The entrance to the case for the stem was sealed by the simple expedient of a cap that completely enclosed the crown and stem and screwed down onto the end of the pendant. French watches were sometimes wound through a hole in the dial and the hands set by turning them with a key on a square boss of the minute hand or centre arbor, so there was no need for the owner to crowns slot the back of the movement, so their cases had a single back or bottom fixed to the middle part of the case.
To fully remove the movement from the case, the hinge pin is pushed out. The case on the left is the outer case of the pair. Nothing is done about the engraving on the back of the case, which is a dead give away that the watch left the factory as a pocket watch.
But the oak blackjack reason for wearing a wristwatch was to make it easy to read the time, and if the watch was fitted with a lid, it either required the use of the other hand on the other wrist to open the lid, or if a demi hunter lid was fitted, the accuracy of reading was reduced.
Savonnette watches usually have a button on the top of the stem to release the catch which holds the lid closed, and it is convenient to operate this button with the thumb, the watch being held in the palm of the hand.
The image here shows an Crowns slot pair cased watch with a fusee verge movement. How easy was this? These are sometimes called "Napoleons" because there is a story that the Emperor got so frustrated with having to open the lid of his hunter that he took a knife and made a circular cut out in the lid.
It is sterling silver and has London Assay Office hallmarks for tobut there is no sponsor's mark.
The critical item is, of course, the location of the fourth crowns slot, but it is much easier at a quick glance to locate the balance. However, there is absolutely no provision for sealing the slot in the casino hippodrome toulouse side that the stem drops in to, and because the case is a cushion shape the bezel snaps on.