Rayon I postage stamp of 1850
... that a blue Rayon I postage stamp of 1850 is the most expensive Swiss stamp ever sold at auction?
... that a blue <b id="mwG8o"><a href="./Local_mail_and_rayon_stamps_of_Switzerland" id="mwG8s" rel="mw:WikiLink" title="Local mail and rayon stamps of Switzerland"><i id="mwG8w">Rayon I</i> postage stamp of 1850</a></b> <i id="mwG80">(pictured)</i> is the most expensive <a href="./Postage_stamps_and_postal_history_of_Switzerland" id="mwG84" rel="mw:WikiLink" title="Postage stamps and postal history of Switzerland">Swiss stamp</a> ever sold at auction?