“Glorious Mother Country,” 4th series: Major inventions by ancient and medieval Chinese scientists: Drum cart to measure distance, Chin Dynasty - 伟大的祖国, 第四组：中国古代和中世纪科学家的主要发明：记里鼓车, 秦朝 $800 Dark blue
- Country People`s Republic of China
-
Denomination
?$800Face value of a stamp, usually printed on the stamps.— Glossary
-
Color
?Dark blueOriginal catalog color of the stamp.
-
Print method
?EngravedMethod of process of imprinting designs on paper.
-
Perforation
?14Holes punched between stamps to make separating easier.
-
Watermark
?UnwatermarkedA pattern embedded in a paper during stamp producing process.
-
Issue Date
?Date inscripted on a stamp or cancellation for used stamps not necessary correspond to real date of stamp issue.
![]()
-
#
?Catalog number of stamp.
![]()
Same series stamps
-
“Glorious Mother Country,” 4th series: Major inventions by ancient and medieval Chinese scientists: Compass, 3rd Century, B.C. - 伟大的祖国, 第四组：中国古代和中世纪科学家的主要发明：司南，战国时代 (公元前 300年)
![FindYourStampsValue: “Glorious Mother Country,” 4th series: Major inventions by ancient and medieval Chinese scientists: Compass, 3rd Century, B.C. - 伟大的祖国, 第四组：中国古代和中世纪科学家的主要发明：司南，战国时代 (公元前 300年)]()
-
“Glorious Mother Country,” 4th series: Major inventions by ancient and medieval Chinese scientists: Seismoscope, later Han Dynasty - 伟大的祖国, 第四组：中国古代和中世纪科学家的主要发明：地震仪，后汉
![FindYourStampsValue: “Glorious Mother Country,” 4th series: Major inventions by ancient and medieval Chinese scientists: Seismoscope, later Han Dynasty - 伟大的祖国, 第四组：中国古代和中世纪科学家的主要发明：地震仪，后汉]()
-
“Glorious Mother Country,” 4th series: Major inventions by ancient and medieval Chinese scientists: Armillary sphere, Ming Dynasty - 伟大的祖国, 第四组：中国古代和中世纪科学家的主要发明：浑天仪，明代
![FindYourStampsValue: “Glorious Mother Country,” 4th series: Major inventions by ancient and medieval Chinese scientists: Armillary sphere, Ming Dynasty - 伟大的祖国, 第四组：中国古代和中世纪科学家的主要发明：浑天仪，明代]()
