Canada
Elizabeth II silver Specimen Uniface Trial Strike "Swimming Water" 10 Dollars 1976-Dated SP63 PCGS, KM-Unl. 44.9gm. Bonded Planchet, 0.560 fine. Trial issue struck for the 1976 Montréal Olympics featuring swimming water. Similar to the reverse of the issued 1975 $5, but without the athlete in the water and with the higher $10 denomination. A new discovery, and the only known specimen.
https://coins.ha.com/itm/canada/canada-elizabeth-ii-silver-specimen-uniface-trial-strike-swimming-water-10-dollars-1976-dated-sp63-pcgs-/a/3088-34332.s?type=CoinArchives3088
HID02906262019
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Estimate: 2500-3500 USD