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No matter what the watches are, mechanical or quartz, both have collecting value. Actually, some special quartz watches are especially worthy of collecting.

Generally speaking, all watches collections require a relatively good storage environment, wet or long-term exposure is absolutely not allowed. Otherwise, even the gold-plated or K gold watch whose case and strap will be oxidizing and become dark. Therefore, watches should be collected in specialized box. The most important point is to put dampproof silica gel. Avoid placing volatile chemicals around collection watches, such as epoxy glue, mothball, medicine and so on. It certainly includes some cosmetics, since the lead and mercury will change the surface color of gilding and K-gold.

Like mechanical watches, quartz watches need more concern. The temperature should not be too high. Collectors should prepare a pair of white jersey gloves and a piece of soft cloth. When observe the watch, it is better to wear the gloves preventing from left fingerprint on watches. Once there are fingerprints on watches, you should wipe away.

Battery leakage corrodes Rado Swiss Watches watches’ Movement

If the collections are not often-using watches, the most important thing is that take out the battery. In this way, it can prevent the leakage of silver oxide batteries. Batteries’ leakage is the biggest damage of watch. It can corrode movement, destroy circuit board date window and dial.

For some top quartz watches, if preserved well, 20 years later, reequip battery, they all can work normally.

The aboriginal “calendar” watches, dating from the 16th century, were able with a apparatus giving the day, date and ages in accession to the hour which was still estimated at that point in time.

In an agenda watch, the canicule and months chase sequentially but the aforementioned cannot be said of the dates which are either 28, 29, 30 or 31 depending on the ages and whether it is bound year or not. In a “simple” agenda watch, it is all-important to absolute the date 5 times during the year, i.e. the ist day of March, May, July, October and December.

Abrahain-Louis Breguet is usually accustomed with accepting invented the apparatus which fabricated these corrections automatically.

His apparatus led to today’s “perpetual calendar” watches as adjoin to “simple calendar” timepieces. These models are based on the Julian agenda rather than the Gregorian agenda in use today. As a result, bound years are not deleted at the end of three out of four centuries, appropriately authoritative it all-important to absolute the watch three times in 400 years. Regarding bound years, February 29 has been deleted in the years 1700, 1800 and 1900. It won’t be deleted in 2000 but will be in 2100, appropriately today’s ads for abiding agenda watches are adapted in their claims that these models will not accept to be adapted for over a century. The absolute continuance of a year is 365.2422 days. The abiding agenda counts the year as accepting 365.25 canicule while the simple agenda counts 12 x 31 = 372 canicule authoritative it all-important to abolish 6 or 7 canicule every year.

Working Principle

To explain how the abiding agenda works, we will altercate a apparatus devised by the columnist for an ample alarm (see diagram). The arch allotment of the apparatus is the abiding batten (B) which pivots on (b). It allotment to its position by an activity of the bounce (rb) and it commonly pushes adjoin the abiding cam (P). A baby feel (D) completes one about-face per day about point (d) and drags the batten amid the hours of 23hOO and midnight by sliding on its absorbed plane. The abiding akin (B) is able with two pawls (C1) and (C2) which are acted aloft by their two agnate springs. Anniversary day about midnight the bill (Bj) moves the seven-pointed day brilliant which is captivated in abode by its jumper-spring. The diagram shows the position at midnight just afore the jump to March 1. Commonly the date is afflicted by the pawl (Cl) while the pawl (C2) slides assimilate the cam (L).

Date change

Five times per year, if the date changes from the 30th to the lst (or for bound years, from February 28 to 29), it is the pawl (C2) positioned abaft the bolt of the cam (L) which causes the duke to move from 30 to I (or from February 28 to March 1). For the ages change, the batten (M) pivoting on (m) captivated by a pin on the cam (L) moves the ages brilliant from February to March.

The abstruse of the abiding agenda is in compassionate the way that the abiding batten engages the pawl (C2) abaft the bolt of the cam (L) on the adapted date. We accept apparent that the abiding batten at blow pushes adjoin the cam (P). This cam is the anamnesis for the abiding calendar. It has seven ridges agnate to the months with 31 days, four indentations agnate to the months with 30 canicule and a adaptable rectangle for February. The cam appropriately determines the three levels of blow for the abiding lever.

The pawl (C2) which is affianced abaft the bolt of the cam (L) can absorb three altered levels, This pawl can again become affianced abaft the bolt on the black of the 30th and will not act until the 31st at the aforementioned time as the the pawl (Cl).

This again is the case of 31-day months agnate to the seven ridges. The pawl (C2) becomes affianced abaft the bolt on the black of the 29th if the batten pushes on the abject of the indentation. The black of the 30th, amid 23h00 and midnight, it causes the date to change to the 31st. Finally for February the lever, blame on one ancillary of the rectangle and consistently lower than the basal of the indentation, allows the pawl (C2) to move the date from February 28 or 29 anon to March 1.

An able accession is that the baby adaptable rectangle has three abandon centermost from its centermost of circling and the fourth ancillary which is positioned college than the others. Thanks to this baby simple apparatus hidden abaft the date star, it rotates one-quarter of a about-face anniversary year so that already every four years, the accomplished ancillary pushes on the lever.

For that year, the pawl (C2) will alone act on the 29th of February, agnate to the bound year. If we abridge the apparatus by replacing the baby adaptable rectangle by a anchored indentation, the jump will consistently activity on February 28 and the agenda would again accept to be adapted for bound years. This simplified accessory is alleged a “semi-perpetual calendar”.

The ages is afflicted from 31 to I by the activity of a pin placed on the cam (L) acting on the batten (M) which pivots on (m). As anon as the pin of the cam (L) escapes from the lever, the closing is fatigued abaft the next tooth by a spring. The end of (M) is jointed to acquiesce it to canyon abaft the next tooth, appropriately causing it to move at the end of the afterward month.

6. Are Scratch-resistant crystals new?
No. Synthetic sapphire was invented in the 19th century and first used for watch crystals in the 1960s. Now really all high-end watch brands use synthetic sapphire crystals in at least some of their models.

7. Are all scratch-resistant crystals made of synthetic sapphire?
No. Some mineral-glass crystals are also marketed as “scratch resistant.” These crystals have a hard coating that makes them less likely to get scratched.

8. The terms “lunette”, “bombé”, “chevé”, and “boule” are sometimes used to describe watch crystals. What do they mean?
All are French words that refer to the shape of the crystal. “Lunette” simply means round – like a full moon (lune means “moon” in French). Bombé, chevé and boule all mean concave, or dome-shaped.

There are other words used to describe watch-crystal shapes. A “raised” crystal is flat on top but raised up, like a birthday cake. “Shaped crystals” are any that aren’t circular – rectangles, square and ovals being the most common. “Cocktail” shapes are the more exotic and extreme examples of shaped crystals. They include elongated baguette and octahedral (eight-sided) crystals.

9. What are “anti-reflective” or “glare-resistant” crystals?
This type of crystal has been coated on one or both sides with a substance – the same one used on anti-reflective eyeglasses – that lessens reflections and glare and makes it easier to read the watch face. Anti-reflective crystals can be made of either mineral glass or synthetic sapphire. One interesting feature of these crystals is that, viewed from the front, they are virtually invisible because they aren’t reflecting any light. In some instances, the coating gives the crystal a telltale bluish tint, as it does on eyeglasses. This tint is easiest to see if the watch has a light-colored dial.

10. How much do watch crystals cost to replace?
Consumers can expect to pay anything from perhaps $20 to $25 for a plexiglass crystal to more than $100 for a shaped synthetic sapphire one. (At Baume & Mercier, for example, synthetic sapphire crystals range from $65 to $135.) The average cost of a round mineral crystal is about $30 to $60. An anti-reflective coating adds to the cost of any crystal. In general, the more expensive the watch, the more the consumer will have to pay to replace its crystal.