Colnect-2156-427-Unsaturated-Hydrocarbon-Molecule.jpg
Source: Colnect
Issued by: Mexico
Function: postage
Date: 12/7/1973
Issue: chemical engineering school 25th
Denom: 40c
Color: multicolored
Design: stylized hydrocarbon molecule
Watermark: MEX & eagle
Perf: 14
Catalog value:

In collections: unused (Stan Shebs)

External links:
Colnect 481723..neering_School