After this morning's WIA news broadcast I got a call from Rob, VK2ZNZ, inviting me to drop in to see a new acquisition. It's a beautiful Reinartz radio. WW1 vintage he thinks.
Apparently these were available in kit form and this one has been well restored and was in working condition. I played with the "reaction" control but couldn't get it to take off so I'm a little suspicious about the circuit. AM stations were audible though.