Dornier Do28A-1 'N123CA'
The Do28A was actually a twin-engined development of the Do27 single engined transport. Although the later Dornier Skyservant shared the 'Do28' designation, the two types only share the same general layout. Some 60 Do28A-1 were built
This very clean example appears to have been visiting Old Warden for maintenance.
Seen on the morning of the 2013 Autumn Airshow.