The serial number is usually on the soundboard. It's usually not the easiest to read if it's got any age to it. It's probably faint, stencilled or hand written. Go to
http://www.bluebookofpianos.com/serial1.htm for the date of manufacture.
To get a value for sale you'll have to have it visually inspected. There is no other way to get a value. If the piano has an excellent sound and is only lacking in the exterior work, if you want a higher number I would recommend having the refinishing work done. It makes more a much more saleable piano. No one is going to want to buy a piano of this stature only to have to get work done. You'll lose a LOT of money this way. You'll have to almost give it away compared to what you can get having had the work done on it.
Hope this is of any use.
~B~
