Stamps
Scott: 1435 A672
Scott: 1227 A301
The sine wave or variations of the sine wave have appeared on many stamps, often in the context of telecommunications.
| Stamp | Description |
|---|---|
|
France, 1fr, 1975 Scott: 1435 A672 |
|
Spain, 40c, 1964 Scott: 1227 A301 |