New zone for DE, split from Europe/Berlin

[Arthur David Olson]

> The German exclave of Büsingen (http://www.buesingen.de/), surrounded by
the Swiss canton Schaffhausen,
> did not start observing DST in 1980 as the rest of DE (West Germany at
that time) and DD (East Germany at that time) did.

This means that Busingen was like Zurich in 1980 (since Switzerland started
using DST in 1981 rather than 1980).
>From 1950 through 1979, and from 1981 to the present, Zurich and Berlin have
been the same.
Does anyone know whether Busingen started using DST in 1981 (when both
Berlin and Zurich were using it)?
Does anyone know whether Busingen was like Berlin or was like Zurich (or,
for that matter, was doing something else) before 1950?
Thanks for any light you can shed.

        --ado
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