How much is a 1960's Lamott silver-plated flute ( with numbers 943 and
55943 inscribed on flute) in excellent condition worth

Hi chappy,

There are too many variables for me to consider answering this
question.  Valuation is a subjective thing at the best of times.  I
suggest you get a professional opinion; perhaps you could re-focus
your question, and a researcher could help you find an appraiser in
your area.

A.

These days, a good first approach to questions of value is to log onto
eBay (www.ebay.com) and see if you can find similar items for sale. 
You can also search completed auctions and, if any have sold in the
last 30-60 days, you can see what people were willing to pay for them.