no recording available...
a nice QSL card from the
collection of Patrick Robic (2001)
see here the multi-QSL version
from the collection of Rudi Renkwitz (2005), verifying RS-336,
RSY-378, SAD-348,
SF-283, SLB-414,
and SOK-387
------------------------------------------------------------
Callsigns:
SF
TP
Frequencies Morse Telegraphy:
283
.