oldest surviving rotative steam engine
... that the Boulton and Watt steam engine preserved in the Powerhouse Museum in Sydney, Australia, is the oldest surviving rotative steam engine?
... that the <a class="mw-redirect" href="./Boulton_and_Watt_steam_engine" id="mwC6c" rel="mw:WikiLink" title="Boulton and Watt steam engine">Boulton and Watt steam engine</a> preserved in the <a href="./Powerhouse_Museum" id="mwC6g" rel="mw:WikiLink" title="Powerhouse Museum">Powerhouse Museum</a> in <a class="mw-redirect" href="./Sydney,_Australia" id="mwC6k" rel="mw:WikiLink" title="Sydney, Australia">Sydney, Australia</a>, is the <b id="mwC6o"><a class="mw-redirect" href="./Boulton_and_Watt_steam_engine_(Powerhouse_Museum)" id="mwC6s" rel="mw:WikiLink" title="Boulton and Watt steam engine (Powerhouse Museum)">oldest surviving rotative steam engine</a></b>?