There is only one surviving Heinkel 219 Uhu
Or at least that was true untill 2012
It was brought to the Garrison Museum in Aalborg, where some attempt was initiated to salvage the parts. Sadly the focus was on iron, and to avoid that rusting further the parts was kept "dry". Rather quickly the parts on display on the museum started to show corrosion in progress on aluminium parts.
How far this went or if any further attempts to "wash out" the salt was ever made I do not know, because soon after the entire lot was sold to Germany. Where it all ended up I do not know, but hopefully it will be at least kept safe, or even used to re-make an entire plane - I do not know, but would love to hear further news on this machine.
I do not think a W.Nr was ever found.
16 additional images. Click to enlarge.