I have a Mehlin & Sons Inverted Grand Piano Serial # is 24495. What would the estimated value on this piano? I believe it was made in 1903. It's in good condition.
My best advice for obtaining a value is to have it visually inspected by an expert.
If you'd like to have an online valuation, then go to www.bluebookofpianos.com and on the site they offer just that, for a fee.