Stamp: San Miguel volcano (El Salvador 1874)
San Miguel volcano (El Salvador 1874)
01 January (El Salvador ) within release Telegraphs - Contra Sello overprints on 1867 stamps goes into circulation Stamp San Miguel volcano face value 4 Salvadoran real
Stamp is square format.
Postage stamp of 1867 overprinted "CONTRA SELLO" in circle in violet Black overprints also exist; it is not clear whether or not these were used for telegraph purposesAlso in the issue Telegraphs - Contra Sello overprints on 1867 stamps:
- Stamp - San Miguel volcano face value ½;
- Stamp - San Miguel volcano face value 1;
- Stamp - San Miguel volcano face value 2;
- Stamp - San Miguel volcano face value 4;
Stamp San Miguel volcano it reflects the thematic directions:
Telegraphy is the long-distance transmission of messages where the sender uses symbolic codes, known to the recipient, rather than a physical exchange of an object bearing the message. Thus flag semaphore is a method of telegraphy, whereas pigeon post is not. Ancient signalling systems, although sometimes quite extensive and sophisticated as in China, were generally not capable of transmitting arbitrary text messages. Possible messages were fixed and predetermined, so such systems are thus not true telegraphs.
A volcano is a rupture in the crust of a planetary-mass object, such as Earth, that allows hot lava, volcanic ash, and gases to escape from a magma chamber below the surface. The process that forms volcanoes is called volcanism.
