interesting, I did not know. But Wikipedia says so, ..
... King's last words, a mumbled "God damn you!", were addressed to his nurse, Catherine Black, when she gave him a sedative that night. Dawson, who supported the "gentle growth of euthanasia", admitted in the diary that he hastened the King's death by injecting him, after 11.00 p.m., with two consecutive lethal injections: 3⁄4 gr. morphine followed by 1 gr. cocaine shortly afterwards. Dawson wrote that he acted to preserve the King's dignity, to prevent further strain on the family, and so that the King's death at 11:55 p.m. could be announced in the morning edition of The Times newspaper rather than "less appropriate ... evening journals".
I figure this one is about F-12 quality. 80% silver, 20% copper.
http://coinsandcanada.com/coins-prices.php?coin=10-cents-1920&years=10-cents-1911-1921