
Flag of Hong Kong
The First Opium War (1839-1841) gave the British the right to establish a trading port on Hong Kong Island. In 1860 Kowloon was added and in 1898 a 99-year lease of the New Territories was agreed. These 3 parts formed the Crown Colony and now the SAR.
Hong Kong was occupied by the Japanese Empire from 1941 until 1945. The British resumed control afterwards, but also initiated some reforms to appease the local population. From the 1970's Hong Kong developed into a major and global financial center. In 1984, the Sino-British Joint Declaration resulted in the return of Hong Kong to China that took place in 1997. It is currently still separately administered from mainland China in a 'one country, two systems' model, although there is some disagreement on how this is actually applied. In 2014 the Umbrella Protests were aimed at the limited civil liberties but did not have any result so far.
Currency
Initially, the British Pound was used from 1841. However, Spanish Dollars were much more used throughout East Asia through the Mexico-Manila link. In 1845 it was agreed to peg the Spanish Dollar or Mexican Peso to 4 Shillings 2 Pence. In 1863 the first Hong Kong Dollars were minted at the Royal Mint. In 1866 mint was established in Hong Kong but the Chinese did not receive the new coins well. The mint machinery was sold to the Japanese which minted their first silver Yens with it.
The silver crisis of 1873 resulted in a devaluation of the Hong Kong Dollar, which was not linked to gold. From 1895 the British started minting Trade Dollars, depicting Britannia, for use in Hong Kong and Straits Settlements. These coins are still popular with collectors today. They are listed under UK but were only used in Asia.
By 1906 the paper Hong Kong Dollar had fallen to 2 Shillings 4 Pence or 60$=7£. That year the Straits Settlements Dollar was split off for use in the Straits, Malaya and North Borneo. In 1935 the Hong Dollar was devalued by almost 50% to 16$/£ or 1s3d per HK$.
During the Japanese occupation the Military Yen replaced the Hong Kong Dollar. After the Japanese defeat the Yen currency was made void and the Dollar was reintroduced at pre-war rates. Sterling devaluations caused the Hong Kong Dollar to drop from 4 per USD to 6/$ in 1949. The currency floated from 1970 to 1983 when a managed peg was reached between 7.75 and 7.85 HKD per USD, a rate still applicable in 2015.
For years there were speculators betting on a HKD revaluation if China would revaluate its Renminbi, but recent signs of financial weakness in China has fed some speculation the other way. The Hong Dollar is nevertheless still very stable and it weathered the Asian Financial Crisis of 1997 seamlessly.
Coins
In 1861, holed coins of 1 Mil (1/1000 Dollar) were introduced. These coins resembled Chinese Cash coins. That same decade, more denominations upto the silver Dollar were introduced.
Following the devaluation of 1935 base metal replaced silver in the 5 and 10 Cents coins, and after the war this happened to 50 Cents coins.
In 1993 the current coin series was introduced, the first without an English monarch even though the handover would only take place in 1997. The old QE2 coins are still legal tender but are rarely seen in circulation. It is said that most payments in Hong Kong are done by card so that coins are not used so much in general anymore.
https://en.numista.com/catalogue/hong_kong-1.html




