@queensoft the bottom panel of the upright should be easy to remove without any tools. The only caution is that the panel might be a little on the heavy side. But I used to take the panel off on the uprights I owned, it wasnât hard. Each one was a little different though.
You might do google video search for âhow to remove bottom panel of old uprightâ and look at a few different videos to get an idea.
For the grand, does the music desk slide? Most of them can be completely removed. So if you can move it around, or just take it out, I bet youâll find the serial number under the music desk. The music desk shouldnât be heavy, although maybe it is a bit on an older piano. But if youâre worried, do it with two people.
Are these pianos youâre considering purchasing?