I recently listened to The Five Faces of Manfred Mann for the first time in over a year and was reminded of the Hohner Pianet part in "Untie Me." I figured it out about two years ago, and I thought I'd post it.
The Pianet simply doubles selected portions of the piano part. Throughout the song, there are a handful of single D notes in the lower register (nearly two octaves below middle C), and this phrase is at ~2:20:
