You generally could not get a qualified answer to such a "collectibles/antiques" question on a Q&A forum; and if you did, how reliable would it be, unless answerer had the catalog to quote to you from. Because your item is relatively scarce and becoming more so, you should seek out a catalog or perhaps a Wurlitzer owners Website where someone is more apt to have a catalog. It will also help to have more details about your piano and its current tuning and sound quality and any damage and such. A piano repair facility also might be better able to steer you to a source for valuation. This answer assumes that you have already checked for comparables on classified and auction sites.