China and Hong Kong | 2018 Ancient Chinese Scientists and Discoveries Set of Four China Postage Stamps Mint Never Hinged Multicolor

Description

This collectible set of four postage stamps was issued by China to honor ancient Chinese scientists and their works.
Date of issue: May 26, 2018
Size of each stamp: 33 x 44 mm
Colors: Multicolor
Emission: Commemorative
Perforation: 13?
Printing: Offset lithography
Mint, never hinged condition.