China 1990 STAMP set J173 Mint

Modern Chinese Scientists

Technical details:

Scott No: 2301-4
Serial number: J173
Values in set: 4
Date of issue: October 10, 1990
Denomination: 68 fen
Designers: Yang Guchang, Liu Xiangping
Size of stamps: 40*30mm
Perforation: 11
Sheet composition: 50 (5*10)
Printing process: Offset
Printing House: Beijing Postage Stamp Printing Works

SN: (4-1)
Title: Lin Qiaoya, medical scientist
Value: 8 fen

SN: (4-2)
Title: Zhang zhe, astronomer
Values: 10 fen

SN: (4-3)
Title: Hou Debang, chemist
Value: 20 fen

SN: (4-4)
Title: Ding Ying, agronomist
Value: 30 fen

****This was also posted last Oct 10.