You might be surprised to find that the dealership's service department may have switched it out. Although they are not officially supposed to harvest parts from unsold RVs, virtually all dealerships occasionally do it, if it means making a sale.
Someone else probably demanded a convention microwave before they would sign the sale/delivery documents, and you now have theirs!
All you need to do to determine if it was installed at the Thor assembly line is to find your build sheet, (or ask Thor customer service to email it to you). It usually adhered to the inside of a closet cabinet in the bedroom.
The build sheet has the exact serial number of all of the appliances installed at the Thor factory assembly line.
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