Please reference the following URL: https://collection.maas.museum/object/344526#&gid=1&pid=1 I have this exact organ and there is a full description on the pages following the picture. It has the bronze medallion on it and the description fits exactly. The organ has been refinished - which I am sure deflates the value some. There is a very small tear in the bellows but it still plays...just takes a little more pumping than ordinary.
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Thank you for submitting your item for appraisal. This appears to be a harmonium by Alexandre Père et Fils, circa 1860s, possibly walnut and rosewood veneered. Most such harmoniums by this manufacturer sell in the price range listed above, with one exception at auction in Berkshire, UK three years ago when a comparable harmonium sold for approx. 4000 USD. This might have been a battle between two buyers for inexplicable reasons, not representing the current market value for such instruments in general.