The Greenwich Observatory transmitted its time signals via stations
of the British Post Office. Later, the
duty of disseminating these time signals was carried out by the
'National Physical Laboratory' in Teddington.
no recordings available
in 1965, Maarten van Delft
received the time signals from the predecessor of the 'NPL'
- direct from Greenwich
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Callsigns:
GIC**
GPB**
Frequencies Morse Telegraphy:
7397.5
10331.5
13555
.