At your risk.
See previous posts on how this piano was repaired.
As it settled at around A 446Hz, it was decided to use this reference as octaves plus 3rds sounded very euphonic together with the corresponding low note. For example playing E flat together with a high G. There was corresponding cacophony when the piano had been tuned to higher than 450Hz.
So it seems the 5th overtone of a low note mates almost perfectly with no beats with the corresponding high note fundamental when this piano with apparently the original? Ferminy factory strings was tuned on reference A 446Hz.
Octaves correspond greatly too giving what the human brain wants which is slightly higher than times 2.
The upright piano distance from the back wall has been increased to better effect see nearby post.
For explanation on overtones see Piano Tuning - Reblitz, Musical Acoustics - Hall.
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