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:
---
*According to some internet sources, Manfred Mann also played the Hohner Cembalet, but I haven't seen any evidence of this. As far as I can tell, the only difference between the Cembalet and the Pianet is the range of the keyboard (the Cembalet is C to C where the Pianet is F to F).
