Brazil
Republic silver "Opening of Santos Dumont Museum" Commemorative Bar 1957 UNC, cf. Unusual Word Coins, pg. 67, Type XIII. 71mm, 75.02gm. Stamped "N", "7", and "B" to one side, and "T 920" to other side.
https://coins.ha.com/itm/brazil/brazil-republic-silver-opening-of-santos-dumont-museum-commemorative-bar-1957-unc-/a/61181-97117.s?type=CoinArchives61181
HID02906262019
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Estimate: 200-300 USD