Uruguay
Printed in numbered sheets of 16 stamps and nine labels.
| Country: | Uruguay |
| Type: | Postage stamps |
| Series: | Evolution of knowledge and technique |
| Nominal: | 120 N$ |
| Year: | 1991 |
| Material: | fluorescent |
| Perforation: | comb 12 |
| Mintage: | 100,000 |
Evolution of knowledge and technique
 Megalithic monument |  Wheel, pyramids |  Printing press, solar system discovery |  Satellite |