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The most valuable 1911 sovereign would be the London Mint Proof Sovereign with a George V obverse and the St. George reverse design. These coins are sought after by collectors for their rarity, quality of strike, and historical significance, and can fetch high prices at auctions or through dealers specializing in rare coins.
Hearing is the most valuable sense to a dolphin, as they use echolocation to navigate, communicate, and locate prey in the ocean.
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The most valuable signature in the world is believed to be that of William Shakespeare, as his autograph is extremely rare and highly sought after by collectors. Another highly valuable signature is that of Leonardo da Vinci, known for his iconic artworks.
Coal is the most valuable mineral in Pennsylvania. The state has abundant coal reserves, making it a significant contributor to the state's economy and energy production.
As of 2021, the Dallas Cowboys of the NFL are considered to be the most valuable sports team in the world, with an estimated value of over $5 billion.