National Science Conference, China
Scott No: 1381-83,83a
Serial number: J25
Values in set: 3
Date of issue: March 18, 1978
Denomination: 24 fen
Designer: Xu Yanbo
Size of stamps: 30*40mm
Perforation: 11.5*11
Sheet composition: 50(10*5)
Size of M/S: 140*106mm
Stamps of M/S: (40*30mm)*3
Printing process: Photogravure
Printing House: Beijing Postage Stamp Printing Works
