My system is not decent

The value of fine metal coins, especially commemorative coins, is more importantly reflected in the version.

That is, after the refined coins and the general system are oxidized, can they still be distinguished as two different versions.

It is a lack of basic knowledge of coin collection to count on the difference in packaging to distinguish the edition.

Copper-nickel alloy refined coins have no chamfers on the edges, and this difference has nothing to do with oxidation.

The alloy itself oxidizes slowly, even if it is oxidized, the obvious difference can be seen from the face of the coin.

For example, some refined coins, even if they are all oxidized and appear gray, basically do not affect their value.

Steel-core nickel-plated refined coins are kept normally, and I estimate that there will be no obvious oxidation within 100 years, so there is no need to discuss the oxidation problem.

Brass alloys have only been used in ordinary commemorative coins since 01.

Due to the relatively good craftsmanship of common coins, both sandblasting and polishing, the difference between refined and common coins is not too big.

If it is oxidized, the difference between the face of the coin will be smaller.

There are two cases for the difference in the side of the coin. One is that the zodiac has the letter "J", and the other is that there is no difference in other varieties, including the Olympic commemorative coins.

Common coins of copper alloy coins are not sandblasted, and have obvious visual differences from refined coins.

But after oxidation, the difference will become smaller, and there is no difference in the edge of the coin.

There are many factors that affect the collection value of refined coins. For collectors, they must be collected comprehensively and systematically, and they are incomplete without any variety.

"Not only simple ancient gold coins, but also some modern commemorative coins, and they are very professionally preserved!"

After viewing the collection in a cellar, Chen Wenzhe could only be very emotional.

Those tomb robbers gave full play to the ancient teaching of the three caves of the cunning rabbit and hid their wealth in cellars and ancient tombs.

If there is no cheating method, simple interrogation, really can't find out, because this is their guarantee for the rest of their lives.

No matter how many tomb robbers there are, the sentence is only ten or eight years, up to 20 years, and they will always come out.

When you come out, if you are old, how will you live?Still have to rely on previous accumulation?

Now it seems that they have accumulated too much.

Of course, as long as Chen Wenzhe looked carefully, he could still tell that the reason why there were so many dens hiding wealth was entirely because the tomb robbers were not in the same mind.

Among these people, at most two or three people are a small group.

That is to say, when working on a big case, they will get together.

These people will even communicate with each other, for example, those who collect gold and silver wares can exchange bronze wares for things in the same industry.

Is this also considered a bunch of goods?In addition to their own collections, they will also ship with them according to the needs of their customers.

"It's fine to sell them. They don't have to think about these hidden stolen goods. They can discuss with the country to see if they can be displayed in my museum. At worst, they will donate them all to the country after my death."

For these stolen goods, Chen Wenzhe already had an idea, that is, he was only alive, and kept them in his hands for a while.

When he dies, he will teach everything to the state, and he will not be able to control it at that time.

As for the wealth of their children and grandchildren, they will definitely not lack it.

“Not badly preserved, even very professional!”

Looking at a specially restored cellar, Chen Wenzhe really admired those tomb robbers. They are really professional in the preservation of antiques.

Don't think that gold products don't need to be preserved, because if they are not well preserved, their value will be impressed.

Such as gold products, generally try not to touch the surface directly with your hands.

Because sweat from your hands can contaminate the surface of the coin, it is best to seal the coin with airtight plastic.

It is also more convenient to watch in this way, and it also prevents the dust in the air from polluting the surface of the gold coin.

Try not to collide, because it is easy to leave marks when colliding with each other.

If the gold coin is dirty, wash it slightly in warm soapy water, then rinse it with clean water, dry it gently with a soft cloth, and finally place it in a dry and ventilated place;
Try not to wash it with highly alkaline water, and don't brush it with a brush.

Alkaline solution will easily corrode the surface of gold coins.

In addition, color-changing silica gel should be placed in the place where the gold coins are stored, it mainly plays the role of absorbing moisture;
Silica gel is blue when dry and turns red when it absorbs moisture.

It is best to put it in a safe that is anti-corrosion and moisture-proof. These tomb robbers have done a good job.

"Accidentally found Chu gold coins and modern commemorative coins, so are there any gold coins from other eras in our country? There must be. It is impossible that they only found the Chu gold coins from a thousand years ago in China?"

Since he felt that there was still a place to hide, Chen Wenzhe naturally would not let it go.

Therefore, he will backtrack in more detail.

Sure enough, he soon discovered a series of gold coins, including gold coins from the Warring States period. This should be the earliest gold coin discovered in our country, right?

Chen Wenzhe is very clear that gold coins have been used in our country as early as the Warring States Period!

No one really knows what the gold coins used in ancient my country looked like, at least most of them don't know, because they can't be seen at all.

Everyone knows that the ancient smelting technology in our country was very developed.

As early as the Shang Dynasty more than 4000 years ago, there was a tradition of using gold.

The golden jade clothes of the Han Dynasty and so on, carried forward the gold even more!

So, what are the gold coins in ancient my country?
The first is gilt copper shells, but seriously, gilt copper shells are not considered gold coins.

But strictly speaking, this is the earliest coin in my country to use gold for coins.

Since there are gilt copper shells, there must be copper shell coins.

Copper shell coin is a new currency produced after the original shell coin.

It does not deviate from the original shell shape, but continues the imitation of the shell shape.

The emergence of copper shell coins in the Western Zhou Dynasty adapted to the development of social productivity.

As a currency, copper shell coins have durability and value that are more suitable for circulation.

Copper shell coins in the Western Zhou Dynasty still took the oval shape as the basic shape in pursuit of Bi Xiao's imitation of natural shells.

The ventral surface imitates shells to create a curved concave line, and the back is raised without ornamentation.

After casting, the outer layer of the copper shell is gilded to enhance the value attribute of the copper shell as currency.

Gilt copper shells are rarely traded in the market, and the market valuation is around RMB 80.

Due to the long history, the outer gold layer of most gilt copper shells has peeled off, so more care must be taken when storing them.

These gold-plated shell coins are often very small in size, generally only two centimeters in diameter.

Seashells are produced in the sea, and the number of seashells that could be transported to the Central Plains during the Yin and Shang Dynasties was extremely limited.

Later, in the process of use, it gradually evolved into a medium of exchange for general equivalents.

With the development of the commodity economy at that time, the supply of natural seashells gradually exceeded the demand.

So imitations were used instead, and bone shells, mussel shells, jade shells, stone shells, Tao shells, etc. appeared.