The device was first used by the Swiss police in 1940.
It was classified as "extremist" by the Swiss federal police in 2001.
With the help of the Swiss national police, he finally got a call through to his palace.
They would remember him only after being shown his photograph later by Swiss police.
The Swiss police said they had so far found no explanation for the deaths.
The Swiss police said they were searching for both men.
The use of Swiss police for such actions would be illegal.
The interior is a matter for the Swiss police.
Follow-up work by the Swiss police would count it up.
There were two of them, blue, belonging to the Swiss police.