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20樓發表于: 2013-10-29 12:24

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Re:回 74樓(swift) 的帖子

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引用第75樓ming8686于2013-10-29 08:56發表的回 74樓(swift) 的帖子 :
Swift兄,

I'm sure I can find it. Thanks for the tip.

偶爾也會買問題票. 這張小字加蓋窄距一圓的”巾”部份和兩個零好像是被某種溶劑消掉的. 記得很久以前就有專門去掉原子筆油墨的東西(hairspray can also do the trick). 現在是否有什麼溶劑可以消掉加蓋的油墨但又不影響原票. 小弟只想知道這種技術存不存在,不須知道溶劑名稱.

沒見過類似的，但是兩個「0」還有影子，無法排除是加工過。

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21樓發表于: 2013-10-29 20:20

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These "products" were meant to deceive novice collectors. Forgive me for being too straightforward. I would not consider these altered stamps deserve any study. They can be used as a negetive example, at most.

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22樓發表于: 2013-10-29 22:34

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Re:回 79樓(swift) 的帖子

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引用第80樓ming8686于2013-10-29 21:10發表的回 79樓(swift) 的帖子 :
Sorry, maybe that is not a good thing to talk about here. I just removed the second picture.
I highly suspected that they were altered stamps when I acquired them. I collected them to see what technique people can do currently. These two examples are the ones that are easier to spot. I guess I'm the only few collecting this kind of stuff. I posted the pictures here not to confuse peopel, just for reference.It seems to me that this topic is too sensitive, I should stop right here.

If the overprint can be wiped completely and undetectedly, that would be very scary. A fellow from APS local club told me few years ago that anything is possible now. He had seen one that he could not tell it's been altered and yet he is an expert on altered stamps.

.......

My words might be too strong. We are facing the dilemma of calling collector's attention and help improving techniques for making fakes. My suggestion is totally ignoring these obvious fakes. High quality fakes of the unissued silver yuen (see the note under Scott #984-987) stamps exist. I hate to say it but it seems sooner or later dangerous fake of flying geese without denomination may appear. I do wish they appear as late as possible. Frankly, I condemn those who sell fake stamps on eBay even though the sellers clearly say those are reproductions. We never know where those fake stamps will end up. At the end the hobby gets hurt.

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23樓發表于: 2013-10-29 23:36

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There is a famous book for this.

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24樓發表于: 2013-10-30 12:51

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Schmid's book is old. Obviously, some newer technologies are not included in there.

There exists even older books (unfortunately the title is not in my head) in the counterfeit detecting topic. For example, the early Shanghai large dragons were studied in the first part of 20th century. Some "private reproductions" back then have become classic reference. If someone would like to put into efforts, I believe the China large dragons are another suitable candidate for counterfeit study. (If one ever pays attention to large dragons, he or she would find that the market has been upset by high quality fakes.)

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25樓發表于: 2013-10-31 00:02

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Very interesting sites. Thanks.

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26樓發表于: 2013-10-31 10:05

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點在橫上，少見。

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27樓發表于: 2013-10-31 12:53

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You are very luck. The original picture did not seem to have good resolution to clearly show it.

This type of overprint is indeed very rare. A few famous collector in this area, including Paul Chang, did not have a chance to buy mint copies from postal office. It seems that these stamps appeared in some small postal office in central Taiwan and remained unnoticed for a while.

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28樓發表于: 2013-11-01 20:49

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Don't know much about major rarities about this issue. They cost too much.

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29樓發表于: 2013-11-02 15:42

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引用第96樓ilan69于2013-11-02 15:33發表的 :

ming8686兄真是幸運，難得的『高點2』，附上當時EBAY拍賣上的附圖，沒人看到這枚『高點2』。

[attachment=153161]
.......

不只幸運,是幸運中的幸運。

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