The Yamaha E-5 / E5AR, built around 1972, is an impressive and sturdy piece of furniture (American walnut) with the pretty colourful tone levers that are typical for Yamaha's Electones up to the mid of the 1980s. The recording was done with an ECM-220USB microphone and Audacity running on a MacBook, without further post-processing of the sound.
You find the score of this piece at https://imslp.org/wiki/Dic_nobis,_Maria_(Cabezón,_Antonio_de).