1912 London International Radiotelegraphic Convention
- 1912 London International Radiotelegraphic Convention
The 1912 London International Radiotelegraphic Convention established international callsigns, replacing the three letter callsigns prevalent then. Major world powers were given single prefixes such as N/K/W (United States) A (Germany), F (France), B (Great Britain). British colonies were given the call signs starting with "V. The convention was held in London on May 9, 1913.
References
*http://earlyradiohistory.us/1913call.htm
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