a brief history of czplsk

the czpl component of czplsk
appears to date from the spa conference of 1920
when teschen silesia was partitioned between czechoslovakia & poland
along the dashed line shown by this map

for enlargement & source please see
http://en.wikipedia.org/wiki/Image:Slask_cieszynski.png


& since this territorial allocation disregarded existing municipal boundaries within silesia
most notably those of the city of teschen itself
there is probably little point in seeking an antecedent subdivisional tripoint at present czplsk


the plsk component of czplsk also appears to have been settled by 1920
as this border change map also suggests

enlargement & source
http://en.wikipedia.org/wiki/Image:Zaolzie_mapa.jpg

indeed the alignment shown for the eventual plsk boundary may simply have followed the austro hungarian divide of 1867
which may itself have adhered to still earlier boundaries


but in any case
both the czpl & plsk components of 1920 were confirmed or reaffirmed in 1958
by czechoslovakia & poland


& the czsk component may well have existed in its present form since the beginning of czechoslovakia & poland in 1918
also following the austro hungarian divide of 1867 & its antecedents

but the czechoslovakian portion of silesia was in any case formally merged with moravia in 1928 into the moravskoslezske region depicted by these maps


& this grouping was merged in turn with the bohemian region to form the czech socialist republic within czechoslovakia in 1948


so
all these data
when combined with the apparent fact that czplsk remained unmarked until 2007
do strongly suggest that the exact czplsk tripoint location is relatively young as a tripoint
& that its trifinial configuration was most likely completed in its present form by 1920