"Mignon" is a French word meaning small, or sweet, often applied to small models, such as baby grands, but also including British and French small upright pianos.
As to whether the individual piano is worth restoring, you would have to ask a technician to inspect it on the spot.
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If you find old references or links on this site to pianogen.org, they should refer to pianohistory.info
However, it is safe to say that from a return-on-investment point of view, the vast majority of non-famous brand pianos are very much, absolutely, completely, undoubtedly NOT worth restoring. From a musical point of view, it could be worth restoring but you'll need to ask a tuner to inspect it OR upload a few photos of the piano's guts to this topic and people will be happy to give their opinionBill Kibby wrote:As to whether the individual piano is worth restoring, you would have to ask a technician to inspect it on the spot.