This is my QSL for today’s transmission, 1 May 2018.
Location: Comano, Switzerand.
Distance from Grimeton: 1256 Km
Receiver: one tube Colin B. Kennedy Mod. 110, produced from 1921 to 1925, covering all frequencies between 12,5 Khz to 2 Mhz. Power Supply: batteries
Audio amplifier: Colin B. Kennedy Mod. 525. Power Supply: batteries
Loudspeaker: Isophon Epsilon, high impedance, ca. 1930.
Antenna: Chirio Mini Whip
Much QRM because of low selectivity, but understandable.
Perhaps this is the first QSL you receive, having used a receiver older than the transmitter?
Youtube video clip: