The original tempo
This Interpretation follows the original tempoadvice: 1/4 = 80 bpm as guideline and mostly the upper limit of the realised Tempo, following at the same time aswell notated tempochanges as tempochanges as part of the interpretation without leaving the overall guideline of the demanded tempo anywhere completly. This seemingly implicitness is noteworthy, since from 30 other inspect Interpretations all are more or less slower than the demanded Tempo. In Average the Interpretations are two Minutes longer. That makes a Tempo 1/4 = 56 bpm which is 30% slower than demanded in the score.
The historic Instrument
Erard-Grandpiano 1873 (realsamples)