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| Morse key collection DL3HRT |
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 Austria Post Off... |
.jpg) Austria Post off... |
.jpg) Austria Post Off... |
 France Ducretet&... Ducretet & Roger - aircraft oil break key - World War 1 |
 France Ducretet&... Ducretet & Roger - aircraft oil break key - World War 1 |
 Germany camelbac... German camelback key - 1860s |
 Germany Galvanos... Made by W.Gurlt - Berlin - 1918 |
 Germany Galvanos... Made by Krueger in 1893. |
 Germany Hartmann... Reichstelegraphentaste - Hartmann&Braun - 1888 |
 Germany Hartmann... Reichstelegraphentaste - Hartmann & Braun - 1896. |
 Germany Hartmann... |
 Germany Hartmann... |