NORTH CHINA: North China Postal and Telegraph Administration: Sun Yat-sen, Surcharged in Red - 华北地区:孙中山(红色的套印):华北邮电总局加盖 “华北人民邮政 改作" 改值邮票 $30 on $2.50 Indigo

Without Gum; Type b
- Country People`s Republic of China
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Denomination
?$30 on $2.50Face value of a stamp, usually printed on the stamps.— Glossary
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Color
?IndigoOriginal catalog color of the stamp.
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Print method
?EngravedMethod of process of imprinting designs on paper.
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Perforation
?14Holes punched between stamps to make separating easier.
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Watermark
?UnwatermarkedA pattern embedded in a paper during stamp producing process.
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Issue Date
?Date inscripted on a stamp or cancellation for used stamps not necessary correspond to real date of stamp issue.
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#
?Catalog number of stamp.
SP
Special Peculiarity:
On Type "b" bottom character of left vertical row (yuan) differs (元;圆)
Same series stamps
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NORTH CHINA: North China Postal and Telegraph Administration: Sun Yat-sen, Surcharged in Black - 华北地区:孙中山:华北邮电总局加盖 “华北人民邮政 改作" 改值邮票
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NORTH CHINA: North China Postal and Telegraph Administration: Sun Yat-sen, Surcharged in Black - 华北地区:孙中山:华北邮电总局加盖 “华北人民邮政 改作" 改值邮票
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NORTH CHINA: North China Postal and Telegraph Administration: Sun Yat-sen, Surcharged in Black - 华北地区:孙中山:华北邮电总局加盖 “华北人民邮政 改作" 改值邮票
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NORTH CHINA: North China Postal and Telegraph Administration: Sun Yat-sen, Surcharged in Black - 华北地区:孙中山:华北邮电总局加盖 “华北人民邮政 改作" 改值邮票
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NORTH CHINA: North China Postal and Telegraph Administration: Sun Yat-sen, Surcharged in Black - 华北地区:孙中山:华北邮电总局加盖 “华北人民邮政 改作" 改值邮票
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NORTH CHINA: North China Postal and Telegraph Administration: Sun Yat-sen, Surcharged in Black - 华北地区:孙中山:华北邮电总局加盖 “华北人民邮政 改作" 改值邮票
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NORTH CHINA: North China Postal and Telegraph Administration: Sun Yat-sen, Surcharged in Black - 华北地区:孙中山:华北邮电总局加盖 “华北人民邮政 改作" 改值邮票
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NORTH CHINA: North China Postal and Telegraph Administration: Sun Yat-sen, Surcharged in Black - 华北地区:孙中山:华北邮电总局加盖 “华北人民邮政 改作" 改值邮票
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NORTH CHINA: North China Postal and Telegraph Administration: Sun Yat-sen, Surcharged in Blue - 华北地区:孙中山(蓝色的套印):华北邮电总局加盖 “华北人民邮政 改作" 改值邮票
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NORTH CHINA: North China Postal and Telegraph Administration: Sun Yat-sen, Surcharged in Black - 华北地区:孙中山:华北邮电总局加盖 “华北人民邮政 改作" 改值邮票
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NORTH CHINA: North China Postal and Telegraph Administration: Sun Yat-sen, Surcharged in Red - 华北地区:孙中山(红色的套印):华北邮电总局加盖 “华北人民邮政 改作" 改值邮票
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NORTH CHINA: North China Postal and Telegraph Administration: Sun Yat-sen, Surcharged in Red - 华北地区:孙中山(红色的套印):华北邮电总局加盖 “华北人民邮政 改作" 改值邮票
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NORTH CHINA: North China Postal and Telegraph Administration: Sun Yat-sen, Surcharged in Red - 华北地区:孙中山(红色的套印):华北邮电总局加盖 “华北人民邮政 改作" 改值邮票
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NORTH CHINA: North China Postal and Telegraph Administration: Sun Yat-sen, Surcharged in Red - 华北地区:孙中山(红色的套印):华北邮电总局加盖 “华北人民邮政 改作" 改值邮票
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NORTH CHINA: North China Postal and Telegraph Administration: Sun Yat-sen, Surcharged in Blue - 华北地区:孙中山(蓝色的套印):华北邮电总局加盖 “华北人民邮政 改作" 改值邮票